20907440

素因数分解:

$2^4\times 5^1\times {\mathrm{53}}^1\times {\mathrm{4931}}^1$

素因数の和:4997

約数の個数: 40

約数和(自身を含む): 49537008

約数和(自身を除く): 28629568

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 53, 80, 106, 212, 265, 424, 530, 848, 1060, 2120, 4240, 4931, 9862, 19724, 24655, 39448, 49310, 78896, 98620, 197240, 261343, 394480, 522686, 1045372, 1306715, 2090744, 2613430, 4181488, 5226860, 10453720, 20907440]

約数ペア:

[(1, 20907440), (2, 10453720), (4, 5226860), (5, 4181488), (8, 2613430), (10, 2090744), (16, 1306715), (20, 1045372), (40, 522686), (53, 394480), (80, 261343), (106, 197240), (212, 98620), (265, 78896), (424, 49310), (530, 39448), (848, 24655), (1060, 19724), (2120, 9862), (4240, 4931)]