21018510

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{409}}^1\times {\mathrm{571}}^1$

素因数の和:993

約数の個数: 48

約数和(自身を含む): 54877680

約数和(自身を除く): 33859170

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 409, 571, 818, 1142, 1227, 1713, 2045, 2454, 2855, 3426, 3681, 4090, 5139, 5710, 6135, 7362, 8565, 10278, 12270, 17130, 18405, 25695, 36810, 51390, 233539, 467078, 700617, 1167695, 1401234, 2101851, 2335390, 3503085, 4203702, 7006170, 10509255, 21018510]

約数ペア:

[(1, 21018510), (2, 10509255), (3, 7006170), (5, 4203702), (6, 3503085), (9, 2335390), (10, 2101851), (15, 1401234), (18, 1167695), (30, 700617), (45, 467078), (90, 233539), (409, 51390), (571, 36810), (818, 25695), (1142, 18405), (1227, 17130), (1713, 12270), (2045, 10278), (2454, 8565), (2855, 7362), (3426, 6135), (3681, 5710), (4090, 5139)]