21189308

素因数分解:

$2^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{113}}^1\times {\mathrm{181}}^1$

素因数の和:342

約数の個数: 48

約数和(自身を含む): 44151744

約数和(自身を除く): 22962436

約数列:

[1, 2, 4, 7, 14, 28, 37, 74, 113, 148, 181, 226, 259, 362, 452, 518, 724, 791, 1036, 1267, 1582, 2534, 3164, 4181, 5068, 6697, 8362, 13394, 16724, 20453, 26788, 29267, 40906, 46879, 58534, 81812, 93758, 117068, 143171, 187516, 286342, 572684, 756761, 1513522, 3027044, 5297327, 10594654, 21189308]

約数ペア:

[(1, 21189308), (2, 10594654), (4, 5297327), (7, 3027044), (14, 1513522), (28, 756761), (37, 572684), (74, 286342), (113, 187516), (148, 143171), (181, 117068), (226, 93758), (259, 81812), (362, 58534), (452, 46879), (518, 40906), (724, 29267), (791, 26788), (1036, 20453), (1267, 16724), (1582, 13394), (2534, 8362), (3164, 6697), (4181, 5068)]