21858265

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1609}}^1$

素因数の和:1657

約数の個数: 32

約数和(自身を含む): 32457600

約数和(自身を除く): 10599335

約数列:

[1, 5, 11, 13, 19, 55, 65, 95, 143, 209, 247, 715, 1045, 1235, 1609, 2717, 8045, 13585, 17699, 20917, 30571, 88495, 104585, 152855, 230087, 336281, 397423, 1150435, 1681405, 1987115, 4371653, 21858265]

約数ペア:

[(1, 21858265), (5, 4371653), (11, 1987115), (13, 1681405), (19, 1150435), (55, 397423), (65, 336281), (95, 230087), (143, 152855), (209, 104585), (247, 88495), (715, 30571), (1045, 20917), (1235, 17699), (1609, 13585), (2717, 8045)]