21267688

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{229}}^1$

素因数の和:314

約数の個数: 64

約数和(自身を含む): 46368000

約数和(自身を除く): 25100312

約数列:

[1, 2, 4, 8, 13, 19, 26, 38, 47, 52, 76, 94, 104, 152, 188, 229, 247, 376, 458, 494, 611, 893, 916, 988, 1222, 1786, 1832, 1976, 2444, 2977, 3572, 4351, 4888, 5954, 7144, 8702, 10763, 11609, 11908, 17404, 21526, 23218, 23816, 34808, 43052, 46436, 56563, 86104, 92872, 113126, 139919, 204497, 226252, 279838, 408994, 452504, 559676, 817988, 1119352, 1635976, 2658461, 5316922, 10633844, 21267688]

約数ペア:

[(1, 21267688), (2, 10633844), (4, 5316922), (8, 2658461), (13, 1635976), (19, 1119352), (26, 817988), (38, 559676), (47, 452504), (52, 408994), (76, 279838), (94, 226252), (104, 204497), (152, 139919), (188, 113126), (229, 92872), (247, 86104), (376, 56563), (458, 46436), (494, 43052), (611, 34808), (893, 23816), (916, 23218), (988, 21526), (1222, 17404), (1786, 11908), (1832, 11609), (1976, 10763), (2444, 8702), (2977, 7144), (3572, 5954), (4351, 4888)]