20385180

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{1039}}^1$

素因数の和:1163

約数の個数: 72

約数和(自身を含む): 62462400

約数和(自身を除く): 42077220

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 109, 180, 218, 327, 436, 545, 654, 981, 1039, 1090, 1308, 1635, 1962, 2078, 2180, 3117, 3270, 3924, 4156, 4905, 5195, 6234, 6540, 9351, 9810, 10390, 12468, 15585, 18702, 19620, 20780, 31170, 37404, 46755, 62340, 93510, 113251, 187020, 226502, 339753, 453004, 566255, 679506, 1019259, 1132510, 1359012, 1698765, 2038518, 2265020, 3397530, 4077036, 5096295, 6795060, 10192590, 20385180]

約数ペア:

[(1, 20385180), (2, 10192590), (3, 6795060), (4, 5096295), (5, 4077036), (6, 3397530), (9, 2265020), (10, 2038518), (12, 1698765), (15, 1359012), (18, 1132510), (20, 1019259), (30, 679506), (36, 566255), (45, 453004), (60, 339753), (90, 226502), (109, 187020), (180, 113251), (218, 93510), (327, 62340), (436, 46755), (545, 37404), (654, 31170), (981, 20780), (1039, 19620), (1090, 18702), (1308, 15585), (1635, 12468), (1962, 10390), (2078, 9810), (2180, 9351), (3117, 6540), (3270, 6234), (3924, 5195), (4156, 4905)]