20469640

素因数分解:

$2^3\times 5^1\times {\mathrm{631}}^1\times {\mathrm{811}}^1$

素因数の和:1453

約数の個数: 32

約数和(自身を含む): 46186560

約数和(自身を除く): 25716920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 631, 811, 1262, 1622, 2524, 3155, 3244, 4055, 5048, 6310, 6488, 8110, 12620, 16220, 25240, 32440, 511741, 1023482, 2046964, 2558705, 4093928, 5117410, 10234820, 20469640]

約数ペア:

[(1, 20469640), (2, 10234820), (4, 5117410), (5, 4093928), (8, 2558705), (10, 2046964), (20, 1023482), (40, 511741), (631, 32440), (811, 25240), (1262, 16220), (1622, 12620), (2524, 8110), (3155, 6488), (3244, 6310), (4055, 5048)]