20611900

素因数分解:

$2^2\times 5^2\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{109}}^1$

素因数の和:215

約数の個数: 72

約数和(自身を含む): 47358080

約数和(自身を除く): 26746180

約数列:

[1, 2, 4, 5, 10, 20, 25, 31, 50, 61, 62, 100, 109, 122, 124, 155, 218, 244, 305, 310, 436, 545, 610, 620, 775, 1090, 1220, 1525, 1550, 1891, 2180, 2725, 3050, 3100, 3379, 3782, 5450, 6100, 6649, 6758, 7564, 9455, 10900, 13298, 13516, 16895, 18910, 26596, 33245, 33790, 37820, 47275, 66490, 67580, 84475, 94550, 132980, 166225, 168950, 189100, 206119, 332450, 337900, 412238, 664900, 824476, 1030595, 2061190, 4122380, 5152975, 10305950, 20611900]

約数ペア:

[(1, 20611900), (2, 10305950), (4, 5152975), (5, 4122380), (10, 2061190), (20, 1030595), (25, 824476), (31, 664900), (50, 412238), (61, 337900), (62, 332450), (100, 206119), (109, 189100), (122, 168950), (124, 166225), (155, 132980), (218, 94550), (244, 84475), (305, 67580), (310, 66490), (436, 47275), (545, 37820), (610, 33790), (620, 33245), (775, 26596), (1090, 18910), (1220, 16895), (1525, 13516), (1550, 13298), (1891, 10900), (2180, 9455), (2725, 7564), (3050, 6758), (3100, 6649), (3379, 6100), (3782, 5450)]