21339505

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{787}}^1$

素因数の和:849

約数の個数: 32

約数和(自身を含む): 30637440

約数和(自身を除く): 9297935

約数列:

[1, 5, 11, 17, 29, 55, 85, 145, 187, 319, 493, 787, 935, 1595, 2465, 3935, 5423, 8657, 13379, 22823, 27115, 43285, 66895, 114115, 147169, 251053, 387991, 735845, 1255265, 1939955, 4267901, 21339505]

約数ペア:

[(1, 21339505), (5, 4267901), (11, 1939955), (17, 1255265), (29, 735845), (55, 387991), (85, 251053), (145, 147169), (187, 114115), (319, 66895), (493, 43285), (787, 27115), (935, 22823), (1595, 13379), (2465, 8657), (3935, 5423)]