257514920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{495221}}^1$

素因数の和:495245

約数の個数: 32

約数和(自身を含む): 623979720

約数和(自身を除く): 366464800

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 495221, 990442, 1980884, 2476105, 3961768, 4952210, 6437873, 9904420, 12875746, 19808840, 25751492, 32189365, 51502984, 64378730, 128757460, 257514920]

約数ペア:

[(1, 257514920), (2, 128757460), (4, 64378730), (5, 51502984), (8, 32189365), (10, 25751492), (13, 19808840), (20, 12875746), (26, 9904420), (40, 6437873), (52, 4952210), (65, 3961768), (104, 2476105), (130, 1980884), (260, 990442), (520, 495221)]