20921220

素因数分解:

$2^2\times 3^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1$

素因数の和:131

約数の個数: 192

約数和(自身を含む): 71850240

約数和(自身を除く): 50929020

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 17, 18, 20, 27, 30, 34, 36, 43, 45, 51, 53, 54, 60, 68, 85, 86, 90, 102, 106, 108, 129, 135, 153, 159, 170, 172, 180, 204, 212, 215, 255, 258, 265, 270, 306, 318, 340, 387, 430, 459, 477, 510, 516, 530, 540, 612, 636, 645, 731, 765, 774, 795, 860, 901, 918, 954, 1020, 1060, 1161, 1290, 1431, 1462, 1530, 1548, 1590, 1802, 1836, 1908, 1935, 2193, 2279, 2295, 2322, 2385, 2580, 2703, 2862, 2924, 3060, 3180, 3604, 3655, 3870, 4386, 4505, 4558, 4590, 4644, 4770, 5406, 5724, 5805, 6579, 6837, 7155, 7310, 7740, 8109, 8772, 9010, 9116, 9180, 9540, 10812, 10965, 11395, 11610, 13158, 13515, 13674, 14310, 14620, 16218, 18020, 19737, 20511, 21930, 22790, 23220, 24327, 26316, 27030, 27348, 28620, 32436, 32895, 34185, 38743, 39474, 40545, 41022, 43860, 45580, 48654, 54060, 61533, 65790, 68370, 77486, 78948, 81090, 82044, 97308, 98685, 102555, 116229, 121635, 123066, 131580, 136740, 154972, 162180, 193715, 197370, 205110, 232458, 243270, 246132, 307665, 348687, 387430, 394740, 410220, 464916, 486540, 581145, 615330, 697374, 774860, 1046061, 1162290, 1230660, 1394748, 1743435, 2092122, 2324580, 3486870, 4184244, 5230305, 6973740, 10460610, 20921220]

約数ペア:

[(1, 20921220), (2, 10460610), (3, 6973740), (4, 5230305), (5, 4184244), (6, 3486870), (9, 2324580), (10, 2092122), (12, 1743435), (15, 1394748), (17, 1230660), (18, 1162290), (20, 1046061), (27, 774860), (30, 697374), (34, 615330), (36, 581145), (43, 486540), (45, 464916), (51, 410220), (53, 394740), (54, 387430), (60, 348687), (68, 307665), (85, 246132), (86, 243270), (90, 232458), (102, 205110), (106, 197370), (108, 193715), (129, 162180), (135, 154972), (153, 136740), (159, 131580), (170, 123066), (172, 121635), (180, 116229), (204, 102555), (212, 98685), (215, 97308), (255, 82044), (258, 81090), (265, 78948), (270, 77486), (306, 68370), (318, 65790), (340, 61533), (387, 54060), (430, 48654), (459, 45580), (477, 43860), (510, 41022), (516, 40545), (530, 39474), (540, 38743), (612, 34185), (636, 32895), (645, 32436), (731, 28620), (765, 27348), (774, 27030), (795, 26316), (860, 24327), (901, 23220), (918, 22790), (954, 21930), (1020, 20511), (1060, 19737), (1161, 18020), (1290, 16218), (1431, 14620), (1462, 14310), (1530, 13674), (1548, 13515), (1590, 13158), (1802, 11610), (1836, 11395), (1908, 10965), (1935, 10812), (2193, 9540), (2279, 9180), (2295, 9116), (2322, 9010), (2385, 8772), (2580, 8109), (2703, 7740), (2862, 7310), (2924, 7155), (3060, 6837), (3180, 6579), (3604, 5805), (3655, 5724), (3870, 5406), (4386, 4770), (4505, 4644), (4558, 4590)]