18728760

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{97}}^1\times {\mathrm{1609}}^1$

素因数の和:1720

約数の個数: 64

約数和(自身を含む): 56800800

約数和(自身を除く): 38072040

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 97, 120, 194, 291, 388, 485, 582, 776, 970, 1164, 1455, 1609, 1940, 2328, 2910, 3218, 3880, 4827, 5820, 6436, 8045, 9654, 11640, 12872, 16090, 19308, 24135, 32180, 38616, 48270, 64360, 96540, 156073, 193080, 312146, 468219, 624292, 780365, 936438, 1248584, 1560730, 1872876, 2341095, 3121460, 3745752, 4682190, 6242920, 9364380, 18728760]

約数ペア:

[(1, 18728760), (2, 9364380), (3, 6242920), (4, 4682190), (5, 3745752), (6, 3121460), (8, 2341095), (10, 1872876), (12, 1560730), (15, 1248584), (20, 936438), (24, 780365), (30, 624292), (40, 468219), (60, 312146), (97, 193080), (120, 156073), (194, 96540), (291, 64360), (388, 48270), (485, 38616), (582, 32180), (776, 24135), (970, 19308), (1164, 16090), (1455, 12872), (1609, 11640), (1940, 9654), (2328, 8045), (2910, 6436), (3218, 5820), (3880, 4827)]