20887180

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{571}}^1$

素因数の和:670

約数の個数: 48

約数和(自身を含む): 46126080

約数和(自身を除く): 25238900

約数列:

[1, 2, 4, 5, 10, 20, 31, 59, 62, 118, 124, 155, 236, 295, 310, 571, 590, 620, 1142, 1180, 1829, 2284, 2855, 3658, 5710, 7316, 9145, 11420, 17701, 18290, 33689, 35402, 36580, 67378, 70804, 88505, 134756, 168445, 177010, 336890, 354020, 673780, 1044359, 2088718, 4177436, 5221795, 10443590, 20887180]

約数ペア:

[(1, 20887180), (2, 10443590), (4, 5221795), (5, 4177436), (10, 2088718), (20, 1044359), (31, 673780), (59, 354020), (62, 336890), (118, 177010), (124, 168445), (155, 134756), (236, 88505), (295, 70804), (310, 67378), (571, 36580), (590, 35402), (620, 33689), (1142, 18290), (1180, 17701), (1829, 11420), (2284, 9145), (2855, 7316), (3658, 5710)]