81123020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{491}}^1\times {\mathrm{751}}^1$

素因数の和:1262

約数の個数: 48

約数和(自身を含む): 186471936

約数和(自身を除く): 105348916

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 491, 751, 982, 1502, 1964, 2455, 3004, 3755, 4910, 5401, 7510, 8261, 9820, 10802, 15020, 16522, 21604, 27005, 33044, 41305, 54010, 82610, 108020, 165220, 368741, 737482, 1474964, 1843705, 3687410, 4056151, 7374820, 8112302, 16224604, 20280755, 40561510, 81123020]

約数ペア:

[(1, 81123020), (2, 40561510), (4, 20280755), (5, 16224604), (10, 8112302), (11, 7374820), (20, 4056151), (22, 3687410), (44, 1843705), (55, 1474964), (110, 737482), (220, 368741), (491, 165220), (751, 108020), (982, 82610), (1502, 54010), (1964, 41305), (2455, 33044), (3004, 27005), (3755, 21604), (4910, 16522), (5401, 15020), (7510, 10802), (8261, 9820)]