20129720

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{38711}}^1$

素因数の和:38735

約数の個数: 32

約数和(自身を含む): 48777120

約数和(自身を除く): 28647400

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 38711, 77422, 154844, 193555, 309688, 387110, 503243, 774220, 1006486, 1548440, 2012972, 2516215, 4025944, 5032430, 10064860, 20129720]

約数ペア:

[(1, 20129720), (2, 10064860), (4, 5032430), (5, 4025944), (8, 2516215), (10, 2012972), (13, 1548440), (20, 1006486), (26, 774220), (40, 503243), (52, 387110), (65, 309688), (104, 193555), (130, 154844), (260, 77422), (520, 38711)]