18121720

素因数分解:

$2^3\times 5^1\times {\mathrm{181}}^1\times {\mathrm{2503}}^1$

素因数の和:2695

約数の個数: 32

約数和(自身を含む): 41015520

約数和(自身を除く): 22893800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 181, 362, 724, 905, 1448, 1810, 2503, 3620, 5006, 7240, 10012, 12515, 20024, 25030, 50060, 100120, 453043, 906086, 1812172, 2265215, 3624344, 4530430, 9060860, 18121720]

約数ペア:

[(1, 18121720), (2, 9060860), (4, 4530430), (5, 3624344), (8, 2265215), (10, 1812172), (20, 906086), (40, 453043), (181, 100120), (362, 50060), (724, 25030), (905, 20024), (1448, 12515), (1810, 10012), (2503, 7240), (3620, 5006)]