20656990

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{163}}^1$

素因数の和:241

約数の個数: 64

約数和(自身を含む): 42508800

約数和(自身を除く): 21851810

約数列:

[1, 2, 5, 10, 19, 23, 29, 38, 46, 58, 95, 115, 145, 163, 190, 230, 290, 326, 437, 551, 667, 815, 874, 1102, 1334, 1630, 2185, 2755, 3097, 3335, 3749, 4370, 4727, 5510, 6194, 6670, 7498, 9454, 12673, 15485, 18745, 23635, 25346, 30970, 37490, 47270, 63365, 71231, 89813, 108721, 126730, 142462, 179626, 217442, 356155, 449065, 543605, 712310, 898130, 1087210, 2065699, 4131398, 10328495, 20656990]

約数ペア:

[(1, 20656990), (2, 10328495), (5, 4131398), (10, 2065699), (19, 1087210), (23, 898130), (29, 712310), (38, 543605), (46, 449065), (58, 356155), (95, 217442), (115, 179626), (145, 142462), (163, 126730), (190, 108721), (230, 89813), (290, 71231), (326, 63365), (437, 47270), (551, 37490), (667, 30970), (815, 25346), (874, 23635), (1102, 18745), (1334, 15485), (1630, 12673), (2185, 9454), (2755, 7498), (3097, 6670), (3335, 6194), (3749, 5510), (4370, 4727)]