20805975

素因数分解:

$3^2\times 5^2\times {\mathrm{89}}^1\times {\mathrm{1039}}^1$

素因数の和:1144

約数の個数: 36

約数和(自身を含む): 37720800

約数和(自身を除く): 16914825

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 89, 225, 267, 445, 801, 1039, 1335, 2225, 3117, 4005, 5195, 6675, 9351, 15585, 20025, 25975, 46755, 77925, 92471, 233775, 277413, 462355, 832239, 1387065, 2311775, 4161195, 6935325, 20805975]

約数ペア:

[(1, 20805975), (3, 6935325), (5, 4161195), (9, 2311775), (15, 1387065), (25, 832239), (45, 462355), (75, 277413), (89, 233775), (225, 92471), (267, 77925), (445, 46755), (801, 25975), (1039, 20025), (1335, 15585), (2225, 9351), (3117, 6675), (4005, 5195)]