20784010

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{149}}^1$

素因数の和:235

約数の個数: 64

約数和(自身を含む): 43092000

約数和(自身を除く): 22307990

約数列:

[1, 2, 5, 10, 13, 26, 29, 37, 58, 65, 74, 130, 145, 149, 185, 290, 298, 370, 377, 481, 745, 754, 962, 1073, 1490, 1885, 1937, 2146, 2405, 3770, 3874, 4321, 4810, 5365, 5513, 8642, 9685, 10730, 11026, 13949, 19370, 21605, 27565, 27898, 43210, 55130, 56173, 69745, 71669, 112346, 139490, 143338, 159877, 280865, 319754, 358345, 561730, 716690, 799385, 1598770, 2078401, 4156802, 10392005, 20784010]

約数ペア:

[(1, 20784010), (2, 10392005), (5, 4156802), (10, 2078401), (13, 1598770), (26, 799385), (29, 716690), (37, 561730), (58, 358345), (65, 319754), (74, 280865), (130, 159877), (145, 143338), (149, 139490), (185, 112346), (290, 71669), (298, 69745), (370, 56173), (377, 55130), (481, 43210), (745, 27898), (754, 27565), (962, 21605), (1073, 19370), (1490, 13949), (1885, 11026), (1937, 10730), (2146, 9685), (2405, 8642), (3770, 5513), (3874, 5365), (4321, 4810)]