21856140

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{53}}^1\times {\mathrm{79}}^1$

素因数の和:176

約数の個数: 144

約数和(自身を含む): 70761600

約数和(自身を除く): 48905460

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 29, 30, 36, 45, 53, 58, 60, 79, 87, 90, 106, 116, 145, 158, 159, 174, 180, 212, 237, 261, 265, 290, 316, 318, 348, 395, 435, 474, 477, 522, 530, 580, 636, 711, 790, 795, 870, 948, 954, 1044, 1060, 1185, 1305, 1422, 1537, 1580, 1590, 1740, 1908, 2291, 2370, 2385, 2610, 2844, 3074, 3180, 3555, 4187, 4582, 4611, 4740, 4770, 5220, 6148, 6873, 7110, 7685, 8374, 9164, 9222, 9540, 11455, 12561, 13746, 13833, 14220, 15370, 16748, 18444, 20619, 20935, 22910, 23055, 25122, 27492, 27666, 30740, 34365, 37683, 41238, 41870, 45820, 46110, 50244, 55332, 62805, 68730, 69165, 75366, 82476, 83740, 92220, 103095, 121423, 125610, 137460, 138330, 150732, 188415, 206190, 242846, 251220, 276660, 364269, 376830, 412380, 485692, 607115, 728538, 753660, 1092807, 1214230, 1457076, 1821345, 2185614, 2428460, 3642690, 4371228, 5464035, 7285380, 10928070, 21856140]

約数ペア:

[(1, 21856140), (2, 10928070), (3, 7285380), (4, 5464035), (5, 4371228), (6, 3642690), (9, 2428460), (10, 2185614), (12, 1821345), (15, 1457076), (18, 1214230), (20, 1092807), (29, 753660), (30, 728538), (36, 607115), (45, 485692), (53, 412380), (58, 376830), (60, 364269), (79, 276660), (87, 251220), (90, 242846), (106, 206190), (116, 188415), (145, 150732), (158, 138330), (159, 137460), (174, 125610), (180, 121423), (212, 103095), (237, 92220), (261, 83740), (265, 82476), (290, 75366), (316, 69165), (318, 68730), (348, 62805), (395, 55332), (435, 50244), (474, 46110), (477, 45820), (522, 41870), (530, 41238), (580, 37683), (636, 34365), (711, 30740), (790, 27666), (795, 27492), (870, 25122), (948, 23055), (954, 22910), (1044, 20935), (1060, 20619), (1185, 18444), (1305, 16748), (1422, 15370), (1537, 14220), (1580, 13833), (1590, 13746), (1740, 12561), (1908, 11455), (2291, 9540), (2370, 9222), (2385, 9164), (2610, 8374), (2844, 7685), (3074, 7110), (3180, 6873), (3555, 6148), (4187, 5220), (4582, 4770), (4611, 4740)]