21861320

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{2473}}^1$

素因数の和:2514

約数の個数: 64

約数和(自身を含む): 56110320

約数和(自身を除く): 34249000

約数列:

[1, 2, 4, 5, 8, 10, 13, 17, 20, 26, 34, 40, 52, 65, 68, 85, 104, 130, 136, 170, 221, 260, 340, 442, 520, 680, 884, 1105, 1768, 2210, 2473, 4420, 4946, 8840, 9892, 12365, 19784, 24730, 32149, 42041, 49460, 64298, 84082, 98920, 128596, 160745, 168164, 210205, 257192, 321490, 336328, 420410, 546533, 642980, 840820, 1093066, 1285960, 1681640, 2186132, 2732665, 4372264, 5465330, 10930660, 21861320]

約数ペア:

[(1, 21861320), (2, 10930660), (4, 5465330), (5, 4372264), (8, 2732665), (10, 2186132), (13, 1681640), (17, 1285960), (20, 1093066), (26, 840820), (34, 642980), (40, 546533), (52, 420410), (65, 336328), (68, 321490), (85, 257192), (104, 210205), (130, 168164), (136, 160745), (170, 128596), (221, 98920), (260, 84082), (340, 64298), (442, 49460), (520, 42041), (680, 32149), (884, 24730), (1105, 19784), (1768, 12365), (2210, 9892), (2473, 8840), (4420, 4946)]