20711760

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{211}}^1\times {\mathrm{409}}^1$

素因数の和:636

約数の個数: 80

約数和(自身を含む): 64668480

約数和(自身を除く): 43956720

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 211, 240, 409, 422, 633, 818, 844, 1055, 1227, 1266, 1636, 1688, 2045, 2110, 2454, 2532, 3165, 3272, 3376, 4090, 4220, 4908, 5064, 6135, 6330, 6544, 8180, 8440, 9816, 10128, 12270, 12660, 16360, 16880, 19632, 24540, 25320, 32720, 49080, 50640, 86299, 98160, 172598, 258897, 345196, 431495, 517794, 690392, 862990, 1035588, 1294485, 1380784, 1725980, 2071176, 2588970, 3451960, 4142352, 5177940, 6903920, 10355880, 20711760]

約数ペア:

[(1, 20711760), (2, 10355880), (3, 6903920), (4, 5177940), (5, 4142352), (6, 3451960), (8, 2588970), (10, 2071176), (12, 1725980), (15, 1380784), (16, 1294485), (20, 1035588), (24, 862990), (30, 690392), (40, 517794), (48, 431495), (60, 345196), (80, 258897), (120, 172598), (211, 98160), (240, 86299), (409, 50640), (422, 49080), (633, 32720), (818, 25320), (844, 24540), (1055, 19632), (1227, 16880), (1266, 16360), (1636, 12660), (1688, 12270), (2045, 10128), (2110, 9816), (2454, 8440), (2532, 8180), (3165, 6544), (3272, 6330), (3376, 6135), (4090, 5064), (4220, 4908)]