21377960

素因数分解:

$2^3\times 5^1\times {\mathrm{659}}^1\times {\mathrm{811}}^1$

素因数の和:1481

約数の個数: 32

約数和(自身を含む): 48232800

約数和(自身を除く): 26854840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 659, 811, 1318, 1622, 2636, 3244, 3295, 4055, 5272, 6488, 6590, 8110, 13180, 16220, 26360, 32440, 534449, 1068898, 2137796, 2672245, 4275592, 5344490, 10688980, 21377960]

約数ペア:

[(1, 21377960), (2, 10688980), (4, 5344490), (5, 4275592), (8, 2672245), (10, 2137796), (20, 1068898), (40, 534449), (659, 32440), (811, 26360), (1318, 16220), (1622, 13180), (2636, 8110), (3244, 6590), (3295, 6488), (4055, 5272)]