21910160

素因数分解:

$2^4\times 5^1\times {\mathrm{103}}^1\times {\mathrm{2659}}^1$

素因数の和:2775

約数の個数: 40

約数和(自身を含む): 51455040

約数和(自身を除く): 29544880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 103, 206, 412, 515, 824, 1030, 1648, 2060, 2659, 4120, 5318, 8240, 10636, 13295, 21272, 26590, 42544, 53180, 106360, 212720, 273877, 547754, 1095508, 1369385, 2191016, 2738770, 4382032, 5477540, 10955080, 21910160]

約数ペア:

[(1, 21910160), (2, 10955080), (4, 5477540), (5, 4382032), (8, 2738770), (10, 2191016), (16, 1369385), (20, 1095508), (40, 547754), (80, 273877), (103, 212720), (206, 106360), (412, 53180), (515, 42544), (824, 26590), (1030, 21272), (1648, 13295), (2060, 10636), (2659, 8240), (4120, 5318)]