19783280

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{22481}}^1$

素因数の和:22505

約数の個数: 40

約数和(自身を含む): 50179824

約数和(自身を除く): 30396544

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 22481, 44962, 89924, 112405, 179848, 224810, 247291, 359696, 449620, 494582, 899240, 989164, 1236455, 1798480, 1978328, 2472910, 3956656, 4945820, 9891640, 19783280]

約数ペア:

[(1, 19783280), (2, 9891640), (4, 4945820), (5, 3956656), (8, 2472910), (10, 1978328), (11, 1798480), (16, 1236455), (20, 989164), (22, 899240), (40, 494582), (44, 449620), (55, 359696), (80, 247291), (88, 224810), (110, 179848), (176, 112405), (220, 89924), (440, 44962), (880, 22481)]