28751320

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{55291}}^1$

素因数の和:55315

約数の個数: 32

約数和(自身を含む): 69667920

約数和(自身を除く): 40916600

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 55291, 110582, 221164, 276455, 442328, 552910, 718783, 1105820, 1437566, 2211640, 2875132, 3593915, 5750264, 7187830, 14375660, 28751320]

約数ペア:

[(1, 28751320), (2, 14375660), (4, 7187830), (5, 5750264), (8, 3593915), (10, 2875132), (13, 2211640), (20, 1437566), (26, 1105820), (40, 718783), (52, 552910), (65, 442328), (104, 276455), (130, 221164), (260, 110582), (520, 55291)]