21021390

素因数分解:

$2^1\times 3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{113}}^1$

素因数の和:195

約数の個数: 128

約数和(自身を含む): 62052480

約数和(自身を除く): 41031090

約数列:

[1, 2, 3, 5, 6, 9, 10, 13, 15, 18, 26, 27, 30, 39, 45, 53, 54, 65, 78, 90, 106, 113, 117, 130, 135, 159, 195, 226, 234, 265, 270, 318, 339, 351, 390, 477, 530, 565, 585, 678, 689, 702, 795, 954, 1017, 1130, 1170, 1378, 1431, 1469, 1590, 1695, 1755, 2034, 2067, 2385, 2862, 2938, 3051, 3390, 3445, 3510, 4134, 4407, 4770, 5085, 5989, 6102, 6201, 6890, 7155, 7345, 8814, 10170, 10335, 11978, 12402, 13221, 14310, 14690, 15255, 17967, 18603, 20670, 22035, 26442, 29945, 30510, 31005, 35934, 37206, 39663, 44070, 53901, 59890, 62010, 66105, 77857, 79326, 89835, 93015, 107802, 132210, 155714, 161703, 179670, 186030, 198315, 233571, 269505, 323406, 389285, 396630, 467142, 539010, 700713, 778570, 808515, 1167855, 1401426, 1617030, 2102139, 2335710, 3503565, 4204278, 7007130, 10510695, 21021390]

約数ペア:

[(1, 21021390), (2, 10510695), (3, 7007130), (5, 4204278), (6, 3503565), (9, 2335710), (10, 2102139), (13, 1617030), (15, 1401426), (18, 1167855), (26, 808515), (27, 778570), (30, 700713), (39, 539010), (45, 467142), (53, 396630), (54, 389285), (65, 323406), (78, 269505), (90, 233571), (106, 198315), (113, 186030), (117, 179670), (130, 161703), (135, 155714), (159, 132210), (195, 107802), (226, 93015), (234, 89835), (265, 79326), (270, 77857), (318, 66105), (339, 62010), (351, 59890), (390, 53901), (477, 44070), (530, 39663), (565, 37206), (585, 35934), (678, 31005), (689, 30510), (702, 29945), (795, 26442), (954, 22035), (1017, 20670), (1130, 18603), (1170, 17967), (1378, 15255), (1431, 14690), (1469, 14310), (1590, 13221), (1695, 12402), (1755, 11978), (2034, 10335), (2067, 10170), (2385, 8814), (2862, 7345), (2938, 7155), (3051, 6890), (3390, 6201), (3445, 6102), (3510, 5989), (4134, 5085), (4407, 4770)]