21029346

素因数分解:

$2^1\times 3^2\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{223}}^1$

素因数の和:288

約数の個数: 72

約数和(自身を含む): 51158016

約数和(自身を除く): 30128670

約数列:

[1, 2, 3, 6, 9, 13, 18, 26, 31, 39, 62, 78, 93, 117, 169, 186, 223, 234, 279, 338, 403, 446, 507, 558, 669, 806, 1014, 1209, 1338, 1521, 2007, 2418, 2899, 3042, 3627, 4014, 5239, 5798, 6913, 7254, 8697, 10478, 13826, 15717, 17394, 20739, 26091, 31434, 37687, 41478, 47151, 52182, 62217, 75374, 89869, 94302, 113061, 124434, 179738, 226122, 269607, 339183, 539214, 678366, 808821, 1168297, 1617642, 2336594, 3504891, 7009782, 10514673, 21029346]

約数ペア:

[(1, 21029346), (2, 10514673), (3, 7009782), (6, 3504891), (9, 2336594), (13, 1617642), (18, 1168297), (26, 808821), (31, 678366), (39, 539214), (62, 339183), (78, 269607), (93, 226122), (117, 179738), (169, 124434), (186, 113061), (223, 94302), (234, 89869), (279, 75374), (338, 62217), (403, 52182), (446, 47151), (507, 41478), (558, 37687), (669, 31434), (806, 26091), (1014, 20739), (1209, 17394), (1338, 15717), (1521, 13826), (2007, 10478), (2418, 8697), (2899, 7254), (3042, 6913), (3627, 5798), (4014, 5239)]