20130320

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{103}}^1\times {\mathrm{349}}^1$

素因数の和:472

約数の個数: 80

約数和(自身を含む): 54163200

約数和(自身を除く): 34032880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 103, 112, 140, 206, 280, 349, 412, 515, 560, 698, 721, 824, 1030, 1396, 1442, 1648, 1745, 2060, 2443, 2792, 2884, 3490, 3605, 4120, 4886, 5584, 5768, 6980, 7210, 8240, 9772, 11536, 12215, 13960, 14420, 19544, 24430, 27920, 28840, 35947, 39088, 48860, 57680, 71894, 97720, 143788, 179735, 195440, 251629, 287576, 359470, 503258, 575152, 718940, 1006516, 1258145, 1437880, 2013032, 2516290, 2875760, 4026064, 5032580, 10065160, 20130320]

約数ペア:

[(1, 20130320), (2, 10065160), (4, 5032580), (5, 4026064), (7, 2875760), (8, 2516290), (10, 2013032), (14, 1437880), (16, 1258145), (20, 1006516), (28, 718940), (35, 575152), (40, 503258), (56, 359470), (70, 287576), (80, 251629), (103, 195440), (112, 179735), (140, 143788), (206, 97720), (280, 71894), (349, 57680), (412, 48860), (515, 39088), (560, 35947), (698, 28840), (721, 27920), (824, 24430), (1030, 19544), (1396, 14420), (1442, 13960), (1648, 12215), (1745, 11536), (2060, 9772), (2443, 8240), (2792, 7210), (2884, 6980), (3490, 5768), (3605, 5584), (4120, 4886)]