18008980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{751}}^1$

素因数の和:880

約数の個数: 48

約数和(自身を含む): 41690880

約数和(自身を除く): 23681900

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 109, 110, 218, 220, 436, 545, 751, 1090, 1199, 1502, 2180, 2398, 3004, 3755, 4796, 5995, 7510, 8261, 11990, 15020, 16522, 23980, 33044, 41305, 81859, 82610, 163718, 165220, 327436, 409295, 818590, 900449, 1637180, 1800898, 3601796, 4502245, 9004490, 18008980]

約数ペア:

[(1, 18008980), (2, 9004490), (4, 4502245), (5, 3601796), (10, 1800898), (11, 1637180), (20, 900449), (22, 818590), (44, 409295), (55, 327436), (109, 165220), (110, 163718), (218, 82610), (220, 81859), (436, 41305), (545, 33044), (751, 23980), (1090, 16522), (1199, 15020), (1502, 11990), (2180, 8261), (2398, 7510), (3004, 5995), (3755, 4796)]