21406790

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{163}}^1\times {\mathrm{571}}^1$

素因数の和:764

約数の個数: 32

約数和(自身を含む): 40525056

約数和(自身を除く): 19118266

約数列:

[1, 2, 5, 10, 23, 46, 115, 163, 230, 326, 571, 815, 1142, 1630, 2855, 3749, 5710, 7498, 13133, 18745, 26266, 37490, 65665, 93073, 131330, 186146, 465365, 930730, 2140679, 4281358, 10703395, 21406790]

約数ペア:

[(1, 21406790), (2, 10703395), (5, 4281358), (10, 2140679), (23, 930730), (46, 465365), (115, 186146), (163, 131330), (230, 93073), (326, 65665), (571, 37490), (815, 26266), (1142, 18745), (1630, 13133), (2855, 7498), (3749, 5710)]