21990410

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{307}}^1$

素因数の和:375

約数の個数: 64

約数和(自身を含む): 46569600

約数和(自身を除く): 24579190

約数列:

[1, 2, 5, 10, 13, 19, 26, 29, 38, 58, 65, 95, 130, 145, 190, 247, 290, 307, 377, 494, 551, 614, 754, 1102, 1235, 1535, 1885, 2470, 2755, 3070, 3770, 3991, 5510, 5833, 7163, 7982, 8903, 11666, 14326, 17806, 19955, 29165, 35815, 39910, 44515, 58330, 71630, 75829, 89030, 115739, 151658, 169157, 231478, 338314, 379145, 578695, 758290, 845785, 1157390, 1691570, 2199041, 4398082, 10995205, 21990410]

約数ペア:

[(1, 21990410), (2, 10995205), (5, 4398082), (10, 2199041), (13, 1691570), (19, 1157390), (26, 845785), (29, 758290), (38, 578695), (58, 379145), (65, 338314), (95, 231478), (130, 169157), (145, 151658), (190, 115739), (247, 89030), (290, 75829), (307, 71630), (377, 58330), (494, 44515), (551, 39910), (614, 35815), (754, 29165), (1102, 19955), (1235, 17806), (1535, 14326), (1885, 11666), (2470, 8903), (2755, 7982), (3070, 7163), (3770, 5833), (3991, 5510)]