21738495

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{163}}^1\times {\mathrm{523}}^1$

素因数の和:711

約数の個数: 32

約数和(自身を含む): 37124352

約数和(自身を除く): 15385857

約数列:

[1, 3, 5, 15, 17, 51, 85, 163, 255, 489, 523, 815, 1569, 2445, 2615, 2771, 7845, 8313, 8891, 13855, 26673, 41565, 44455, 85249, 133365, 255747, 426245, 1278735, 1449233, 4347699, 7246165, 21738495]

約数ペア:

[(1, 21738495), (3, 7246165), (5, 4347699), (15, 1449233), (17, 1278735), (51, 426245), (85, 255747), (163, 133365), (255, 85249), (489, 44455), (523, 41565), (815, 26673), (1569, 13855), (2445, 8891), (2615, 8313), (2771, 7845)]