21871750

素因数分解:

$2^1\times 5^3\times {\mathrm{89}}^1\times {\mathrm{983}}^1$

素因数の和:1089

約数の個数: 32

約数和(自身を含む): 41446080

約数和(自身を除く): 19574330

約数列:

[1, 2, 5, 10, 25, 50, 89, 125, 178, 250, 445, 890, 983, 1966, 2225, 4450, 4915, 9830, 11125, 22250, 24575, 49150, 87487, 122875, 174974, 245750, 437435, 874870, 2187175, 4374350, 10935875, 21871750]

約数ペア:

[(1, 21871750), (2, 10935875), (5, 4374350), (10, 2187175), (25, 874870), (50, 437435), (89, 245750), (125, 174974), (178, 122875), (250, 87487), (445, 49150), (890, 24575), (983, 22250), (1966, 11125), (2225, 9830), (4450, 4915)]