18897705

素因数分解:

$3^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{1609}}^1$

素因数の和:1655

約数の個数: 40

約数和(自身を含む): 35065800

約数和(自身を除く): 16168095

約数列:

[1, 3, 5, 9, 15, 27, 29, 45, 81, 87, 135, 145, 261, 405, 435, 783, 1305, 1609, 2349, 3915, 4827, 8045, 11745, 14481, 24135, 43443, 46661, 72405, 130329, 139983, 217215, 233305, 419949, 651645, 699915, 1259847, 2099745, 3779541, 6299235, 18897705]

約数ペア:

[(1, 18897705), (3, 6299235), (5, 3779541), (9, 2099745), (15, 1259847), (27, 699915), (29, 651645), (45, 419949), (81, 233305), (87, 217215), (135, 139983), (145, 130329), (261, 72405), (405, 46661), (435, 43443), (783, 24135), (1305, 14481), (1609, 11745), (2349, 8045), (3915, 4827)]