21005240

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{11173}}^1$

素因数の和:11231

約数の個数: 32

約数和(自身を含む): 48271680

約数和(自身を除く): 27266440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 94, 188, 235, 376, 470, 940, 1880, 11173, 22346, 44692, 55865, 89384, 111730, 223460, 446920, 525131, 1050262, 2100524, 2625655, 4201048, 5251310, 10502620, 21005240]

約数ペア:

[(1, 21005240), (2, 10502620), (4, 5251310), (5, 4201048), (8, 2625655), (10, 2100524), (20, 1050262), (40, 525131), (47, 446920), (94, 223460), (188, 111730), (235, 89384), (376, 55865), (470, 44692), (940, 22346), (1880, 11173)]