28813720

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{55411}}^1$

素因数の和:55435

約数の個数: 32

約数和(自身を含む): 69819120

約数和(自身を除く): 41005400

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 55411, 110822, 221644, 277055, 443288, 554110, 720343, 1108220, 1440686, 2216440, 2881372, 3601715, 5762744, 7203430, 14406860, 28813720]

約数ペア:

[(1, 28813720), (2, 14406860), (4, 7203430), (5, 5762744), (8, 3601715), (10, 2881372), (13, 2216440), (20, 1440686), (26, 1108220), (40, 720343), (52, 554110), (65, 443288), (104, 277055), (130, 221644), (260, 110822), (520, 55411)]