28657915

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{149}}^1\times {\mathrm{269}}^1$

素因数の和:447

約数の個数: 32

約数和(自身を含む): 40824000

約数和(自身を除く): 12166085

約数列:

[1, 5, 11, 13, 55, 65, 143, 149, 269, 715, 745, 1345, 1639, 1937, 2959, 3497, 8195, 9685, 14795, 17485, 21307, 38467, 40081, 106535, 192335, 200405, 440891, 521053, 2204455, 2605265, 5731583, 28657915]

約数ペア:

[(1, 28657915), (5, 5731583), (11, 2605265), (13, 2204455), (55, 521053), (65, 440891), (143, 200405), (149, 192335), (269, 106535), (715, 40081), (745, 38467), (1345, 21307), (1639, 17485), (1937, 14795), (2959, 9685), (3497, 8195)]