21227240

素因数分解:

$2^3\times 5^1\times {\mathrm{131}}^1\times {\mathrm{4051}}^1$

素因数の和:4193

約数の個数: 32

約数和(自身を含む): 48137760

約数和(自身を除く): 26910520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 131, 262, 524, 655, 1048, 1310, 2620, 4051, 5240, 8102, 16204, 20255, 32408, 40510, 81020, 162040, 530681, 1061362, 2122724, 2653405, 4245448, 5306810, 10613620, 21227240]

約数ペア:

[(1, 21227240), (2, 10613620), (4, 5306810), (5, 4245448), (8, 2653405), (10, 2122724), (20, 1061362), (40, 530681), (131, 162040), (262, 81020), (524, 40510), (655, 32408), (1048, 20255), (1310, 16204), (2620, 8102), (4051, 5240)]