21218834

素因数分解:

$2^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{137}}^1$

素因数の和:219

約数の個数: 64

約数和(自身を含む): 42287616

約数和(自身を除く): 21068782

約数列:

[1, 2, 7, 13, 14, 23, 26, 37, 46, 74, 91, 137, 161, 182, 259, 274, 299, 322, 481, 518, 598, 851, 959, 962, 1702, 1781, 1918, 2093, 3151, 3367, 3562, 4186, 5069, 5957, 6302, 6734, 10138, 11063, 11914, 12467, 22057, 22126, 24934, 35483, 40963, 44114, 65897, 70966, 77441, 81926, 116587, 131794, 154882, 233174, 286741, 461279, 573482, 816109, 922558, 1515631, 1632218, 3031262, 10609417, 21218834]

約数ペア:

[(1, 21218834), (2, 10609417), (7, 3031262), (13, 1632218), (14, 1515631), (23, 922558), (26, 816109), (37, 573482), (46, 461279), (74, 286741), (91, 233174), (137, 154882), (161, 131794), (182, 116587), (259, 81926), (274, 77441), (299, 70966), (322, 65897), (481, 44114), (518, 40963), (598, 35483), (851, 24934), (959, 22126), (962, 22057), (1702, 12467), (1781, 11914), (1918, 11063), (2093, 10138), (3151, 6734), (3367, 6302), (3562, 5957), (4186, 5069)]