21456760

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41263}}^1$

素因数の和:41287

約数の個数: 32

約数和(自身を含む): 51992640

約数和(自身を除く): 30535880

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 41263, 82526, 165052, 206315, 330104, 412630, 536419, 825260, 1072838, 1650520, 2145676, 2682095, 4291352, 5364190, 10728380, 21456760]

約数ペア:

[(1, 21456760), (2, 10728380), (4, 5364190), (5, 4291352), (8, 2682095), (10, 2145676), (13, 1650520), (20, 1072838), (26, 825260), (40, 536419), (52, 412630), (65, 330104), (104, 206315), (130, 165052), (260, 82526), (520, 41263)]