21169540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{1699}}^1$

素因数の和:1804

約数の個数: 48

約数和(自身を含む): 51408000

約数和(自身を除く): 30238460

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 89, 140, 178, 356, 445, 623, 890, 1246, 1699, 1780, 2492, 3115, 3398, 6230, 6796, 8495, 11893, 12460, 16990, 23786, 33980, 47572, 59465, 118930, 151211, 237860, 302422, 604844, 756055, 1058477, 1512110, 2116954, 3024220, 4233908, 5292385, 10584770, 21169540]

約数ペア:

[(1, 21169540), (2, 10584770), (4, 5292385), (5, 4233908), (7, 3024220), (10, 2116954), (14, 1512110), (20, 1058477), (28, 756055), (35, 604844), (70, 302422), (89, 237860), (140, 151211), (178, 118930), (356, 59465), (445, 47572), (623, 33980), (890, 23786), (1246, 16990), (1699, 12460), (1780, 11893), (2492, 8495), (3115, 6796), (3398, 6230)]