21781710

素因数分解:

$2^1\times 3^4\times 5^1\times {\mathrm{26891}}^1$

素因数の和:26910

約数の個数: 40

約数和(自身を含む): 58570776

約数和(自身を除く): 36789066

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 54, 81, 90, 135, 162, 270, 405, 810, 26891, 53782, 80673, 134455, 161346, 242019, 268910, 403365, 484038, 726057, 806730, 1210095, 1452114, 2178171, 2420190, 3630285, 4356342, 7260570, 10890855, 21781710]

約数ペア:

[(1, 21781710), (2, 10890855), (3, 7260570), (5, 4356342), (6, 3630285), (9, 2420190), (10, 2178171), (15, 1452114), (18, 1210095), (27, 806730), (30, 726057), (45, 484038), (54, 403365), (81, 268910), (90, 242019), (135, 161346), (162, 134455), (270, 80673), (405, 53782), (810, 26891)]