21203770

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{109}}^1\times {\mathrm{397}}^1$

素因数の和:527

約数の個数: 48

約数和(自身を含む): 44918280

約数和(自身を除く): 23714510

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 109, 218, 245, 397, 490, 545, 763, 794, 1090, 1526, 1985, 2779, 3815, 3970, 5341, 5558, 7630, 10682, 13895, 19453, 26705, 27790, 38906, 43273, 53410, 86546, 97265, 194530, 216365, 302911, 432730, 605822, 1514555, 2120377, 3029110, 4240754, 10601885, 21203770]

約数ペア:

[(1, 21203770), (2, 10601885), (5, 4240754), (7, 3029110), (10, 2120377), (14, 1514555), (35, 605822), (49, 432730), (70, 302911), (98, 216365), (109, 194530), (218, 97265), (245, 86546), (397, 53410), (490, 43273), (545, 38906), (763, 27790), (794, 26705), (1090, 19453), (1526, 13895), (1985, 10682), (2779, 7630), (3815, 5558), (3970, 5341)]