21455896

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{571}}^1$

素因数の和:656

約数の個数: 64

約数和(自身を含む): 51068160

約数和(自身を除く): 29612264

約数列:

[1, 2, 4, 7, 8, 11, 14, 22, 28, 44, 56, 61, 77, 88, 122, 154, 244, 308, 427, 488, 571, 616, 671, 854, 1142, 1342, 1708, 2284, 2684, 3416, 3997, 4568, 4697, 5368, 6281, 7994, 9394, 12562, 15988, 18788, 25124, 31976, 34831, 37576, 43967, 50248, 69662, 87934, 139324, 175868, 243817, 278648, 351736, 383141, 487634, 766282, 975268, 1532564, 1950536, 2681987, 3065128, 5363974, 10727948, 21455896]

約数ペア:

[(1, 21455896), (2, 10727948), (4, 5363974), (7, 3065128), (8, 2681987), (11, 1950536), (14, 1532564), (22, 975268), (28, 766282), (44, 487634), (56, 383141), (61, 351736), (77, 278648), (88, 243817), (122, 175868), (154, 139324), (244, 87934), (308, 69662), (427, 50248), (488, 43967), (571, 37576), (616, 34831), (671, 31976), (854, 25124), (1142, 18788), (1342, 15988), (1708, 12562), (2284, 9394), (2684, 7994), (3416, 6281), (3997, 5368), (4568, 4697)]