20919730

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{179}}^1$

素因数の和:259

約数の個数: 64

約数和(自身を含む): 43545600

約数和(自身を除く): 22625870

約数列:

[1, 2, 5, 10, 13, 26, 29, 31, 58, 62, 65, 130, 145, 155, 179, 290, 310, 358, 377, 403, 754, 806, 895, 899, 1790, 1798, 1885, 2015, 2327, 3770, 4030, 4495, 4654, 5191, 5549, 8990, 10382, 11098, 11635, 11687, 23270, 23374, 25955, 27745, 51910, 55490, 58435, 67483, 72137, 116870, 134966, 144274, 160921, 321842, 337415, 360685, 674830, 721370, 804605, 1609210, 2091973, 4183946, 10459865, 20919730]

約数ペア:

[(1, 20919730), (2, 10459865), (5, 4183946), (10, 2091973), (13, 1609210), (26, 804605), (29, 721370), (31, 674830), (58, 360685), (62, 337415), (65, 321842), (130, 160921), (145, 144274), (155, 134966), (179, 116870), (290, 72137), (310, 67483), (358, 58435), (377, 55490), (403, 51910), (754, 27745), (806, 25955), (895, 23374), (899, 23270), (1790, 11687), (1798, 11635), (1885, 11098), (2015, 10382), (2327, 8990), (3770, 5549), (4030, 5191), (4495, 4654)]