21089620

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{23}}^1\times {\mathrm{127}}^1$

素因数の和:197

約数の個数: 72

約数和(自身を含む): 49158144

約数和(自身を除く): 28068524

約数列:

[1, 2, 4, 5, 10, 19, 20, 23, 38, 46, 76, 92, 95, 115, 127, 190, 230, 254, 361, 380, 437, 460, 508, 635, 722, 874, 1270, 1444, 1748, 1805, 2185, 2413, 2540, 2921, 3610, 4370, 4826, 5842, 7220, 8303, 8740, 9652, 11684, 12065, 14605, 16606, 24130, 29210, 33212, 41515, 45847, 48260, 55499, 58420, 83030, 91694, 110998, 166060, 183388, 221996, 229235, 277495, 458470, 554990, 916940, 1054481, 1109980, 2108962, 4217924, 5272405, 10544810, 21089620]

約数ペア:

[(1, 21089620), (2, 10544810), (4, 5272405), (5, 4217924), (10, 2108962), (19, 1109980), (20, 1054481), (23, 916940), (38, 554990), (46, 458470), (76, 277495), (92, 229235), (95, 221996), (115, 183388), (127, 166060), (190, 110998), (230, 91694), (254, 83030), (361, 58420), (380, 55499), (437, 48260), (460, 45847), (508, 41515), (635, 33212), (722, 29210), (874, 24130), (1270, 16606), (1444, 14605), (1748, 12065), (1805, 11684), (2185, 9652), (2413, 8740), (2540, 8303), (2921, 7220), (3610, 5842), (4370, 4826)]