18978256

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{6343}}^1$

素因数の和:6379

約数の個数: 40

約数和(自身を含む): 42479424

約数和(自身を除く): 23501168

約数列:

[1, 2, 4, 8, 11, 16, 17, 22, 34, 44, 68, 88, 136, 176, 187, 272, 374, 748, 1496, 2992, 6343, 12686, 25372, 50744, 69773, 101488, 107831, 139546, 215662, 279092, 431324, 558184, 862648, 1116368, 1186141, 1725296, 2372282, 4744564, 9489128, 18978256]

約数ペア:

[(1, 18978256), (2, 9489128), (4, 4744564), (8, 2372282), (11, 1725296), (16, 1186141), (17, 1116368), (22, 862648), (34, 558184), (44, 431324), (68, 279092), (88, 215662), (136, 139546), (176, 107831), (187, 101488), (272, 69773), (374, 50744), (748, 25372), (1496, 12686), (2992, 6343)]