21293840

素因数分解:

$2^4\times 5^1\times {\mathrm{179}}^1\times {\mathrm{1487}}^1$

素因数の和:1679

約数の個数: 40

約数和(自身を含む): 49818240

約数和(自身を除く): 28524400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 179, 358, 716, 895, 1432, 1487, 1790, 2864, 2974, 3580, 5948, 7160, 7435, 11896, 14320, 14870, 23792, 29740, 59480, 118960, 266173, 532346, 1064692, 1330865, 2129384, 2661730, 4258768, 5323460, 10646920, 21293840]

約数ペア:

[(1, 21293840), (2, 10646920), (4, 5323460), (5, 4258768), (8, 2661730), (10, 2129384), (16, 1330865), (20, 1064692), (40, 532346), (80, 266173), (179, 118960), (358, 59480), (716, 29740), (895, 23792), (1432, 14870), (1487, 14320), (1790, 11896), (2864, 7435), (2974, 7160), (3580, 5948)]