19780290

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{271}}^1\times {\mathrm{811}}^1$

素因数の和:1095

約数の個数: 48

約数和(自身を含む): 51682176

約数和(自身を除く): 31901886

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 271, 542, 811, 813, 1355, 1622, 1626, 2433, 2439, 2710, 4055, 4065, 4866, 4878, 7299, 8110, 8130, 12165, 12195, 14598, 24330, 24390, 36495, 72990, 219781, 439562, 659343, 1098905, 1318686, 1978029, 2197810, 3296715, 3956058, 6593430, 9890145, 19780290]

約数ペア:

[(1, 19780290), (2, 9890145), (3, 6593430), (5, 3956058), (6, 3296715), (9, 2197810), (10, 1978029), (15, 1318686), (18, 1098905), (30, 659343), (45, 439562), (90, 219781), (271, 72990), (542, 36495), (811, 24390), (813, 24330), (1355, 14598), (1622, 12195), (1626, 12165), (2433, 8130), (2439, 8110), (2710, 7299), (4055, 4878), (4065, 4866)]