20138175

素因数分解:

$3^2\times 5^2\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{59}}^1$

素因数の和:153

約数の個数: 72

約数和(自身を含む): 38591280

約数和(自身を除く): 18453105

約数列:

[1, 3, 5, 9, 15, 25, 37, 41, 45, 59, 75, 111, 123, 177, 185, 205, 225, 295, 333, 369, 531, 555, 615, 885, 925, 1025, 1475, 1517, 1665, 1845, 2183, 2419, 2655, 2775, 3075, 4425, 4551, 6549, 7257, 7585, 8325, 9225, 10915, 12095, 13275, 13653, 19647, 21771, 22755, 32745, 36285, 37925, 54575, 60475, 68265, 89503, 98235, 108855, 113775, 163725, 181425, 268509, 341325, 447515, 491175, 544275, 805527, 1342545, 2237575, 4027635, 6712725, 20138175]

約数ペア:

[(1, 20138175), (3, 6712725), (5, 4027635), (9, 2237575), (15, 1342545), (25, 805527), (37, 544275), (41, 491175), (45, 447515), (59, 341325), (75, 268509), (111, 181425), (123, 163725), (177, 113775), (185, 108855), (205, 98235), (225, 89503), (295, 68265), (333, 60475), (369, 54575), (531, 37925), (555, 36285), (615, 32745), (885, 22755), (925, 21771), (1025, 19647), (1475, 13653), (1517, 13275), (1665, 12095), (1845, 10915), (2183, 9225), (2419, 8325), (2655, 7585), (2775, 7257), (3075, 6549), (4425, 4551)]