261168440

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{502247}}^1$

素因数の和:502271

約数の個数: 32

約数和(自身を含む): 632832480

約数和(自身を除く): 371664040

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 502247, 1004494, 2008988, 2511235, 4017976, 5022470, 6529211, 10044940, 13058422, 20089880, 26116844, 32646055, 52233688, 65292110, 130584220, 261168440]

約数ペア:

[(1, 261168440), (2, 130584220), (4, 65292110), (5, 52233688), (8, 32646055), (10, 26116844), (13, 20089880), (20, 13058422), (26, 10044940), (40, 6529211), (52, 5022470), (65, 4017976), (104, 2511235), (130, 2008988), (260, 1004494), (520, 502247)]