21316410

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{239}}^1\times {\mathrm{991}}^1$

素因数の和:1243

約数の個数: 48

約数和(自身を含む): 55710720

約数和(自身を除く): 34394310

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 239, 478, 717, 991, 1195, 1434, 1982, 2151, 2390, 2973, 3585, 4302, 4955, 5946, 7170, 8919, 9910, 10755, 14865, 17838, 21510, 29730, 44595, 89190, 236849, 473698, 710547, 1184245, 1421094, 2131641, 2368490, 3552735, 4263282, 7105470, 10658205, 21316410]

約数ペア:

[(1, 21316410), (2, 10658205), (3, 7105470), (5, 4263282), (6, 3552735), (9, 2368490), (10, 2131641), (15, 1421094), (18, 1184245), (30, 710547), (45, 473698), (90, 236849), (239, 89190), (478, 44595), (717, 29730), (991, 21510), (1195, 17838), (1434, 14865), (1982, 10755), (2151, 9910), (2390, 8919), (2973, 7170), (3585, 5946), (4302, 4955)]