19991620

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^3\times {\mathrm{751}}^1$

素因数の和:793

約数の個数: 48

約数和(自身を含む): 46238976

約数和(自身を除く): 26247356

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 751, 1210, 1331, 1502, 2420, 2662, 3004, 3755, 5324, 6655, 7510, 8261, 13310, 15020, 16522, 26620, 33044, 41305, 82610, 90871, 165220, 181742, 363484, 454355, 908710, 999581, 1817420, 1999162, 3998324, 4997905, 9995810, 19991620]

約数ペア:

[(1, 19991620), (2, 9995810), (4, 4997905), (5, 3998324), (10, 1999162), (11, 1817420), (20, 999581), (22, 908710), (44, 454355), (55, 363484), (110, 181742), (121, 165220), (220, 90871), (242, 82610), (484, 41305), (605, 33044), (751, 26620), (1210, 16522), (1331, 15020), (1502, 13310), (2420, 8261), (2662, 7510), (3004, 6655), (3755, 5324)]