20456865

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{17}}^2$

素因数の和:80

約数の個数: 108

約数和(自身を含む): 44587452

約数和(自身を除く): 24130587

約数列:

[1, 3, 5, 9, 11, 13, 15, 17, 33, 39, 45, 51, 55, 65, 85, 99, 117, 121, 143, 153, 165, 187, 195, 221, 255, 289, 363, 429, 495, 561, 585, 605, 663, 715, 765, 867, 935, 1089, 1105, 1287, 1445, 1573, 1683, 1815, 1989, 2057, 2145, 2431, 2601, 2805, 3179, 3315, 3757, 4335, 4719, 5445, 6171, 6435, 7293, 7865, 8415, 9537, 9945, 10285, 11271, 12155, 13005, 14157, 15895, 18513, 18785, 21879, 23595, 26741, 28611, 30855, 33813, 34969, 36465, 41327, 47685, 56355, 70785, 80223, 92565, 104907, 109395, 123981, 133705, 143055, 169065, 174845, 206635, 240669, 314721, 371943, 401115, 454597, 524535, 619905, 1203345, 1363791, 1573605, 1859715, 2272985, 4091373, 6818955, 20456865]

約数ペア:

[(1, 20456865), (3, 6818955), (5, 4091373), (9, 2272985), (11, 1859715), (13, 1573605), (15, 1363791), (17, 1203345), (33, 619905), (39, 524535), (45, 454597), (51, 401115), (55, 371943), (65, 314721), (85, 240669), (99, 206635), (117, 174845), (121, 169065), (143, 143055), (153, 133705), (165, 123981), (187, 109395), (195, 104907), (221, 92565), (255, 80223), (289, 70785), (363, 56355), (429, 47685), (495, 41327), (561, 36465), (585, 34969), (605, 33813), (663, 30855), (715, 28611), (765, 26741), (867, 23595), (935, 21879), (1089, 18785), (1105, 18513), (1287, 15895), (1445, 14157), (1573, 13005), (1683, 12155), (1815, 11271), (1989, 10285), (2057, 9945), (2145, 9537), (2431, 8415), (2601, 7865), (2805, 7293), (3179, 6435), (3315, 6171), (3757, 5445), (4335, 4719)]