21259340

素因数分解:

$2^2\times 5^1\times {\mathrm{659}}^1\times {\mathrm{1613}}^1$

素因数の和:2281

約数の個数: 24

約数和(自身を含む): 44740080

約数和(自身を除く): 23480740

約数列:

[1, 2, 4, 5, 10, 20, 659, 1318, 1613, 2636, 3226, 3295, 6452, 6590, 8065, 13180, 16130, 32260, 1062967, 2125934, 4251868, 5314835, 10629670, 21259340]

約数ペア:

[(1, 21259340), (2, 10629670), (4, 5314835), (5, 4251868), (10, 2125934), (20, 1062967), (659, 32260), (1318, 16130), (1613, 13180), (2636, 8065), (3226, 6590), (3295, 6452)]