20495750

素因数分解:

$2^1\times 5^3\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{257}}^1$

素因数の和:314

約数の個数: 64

約数和(自身を含む): 43467840

約数和(自身を除く): 22972090

約数列:

[1, 2, 5, 10, 11, 22, 25, 29, 50, 55, 58, 110, 125, 145, 250, 257, 275, 290, 319, 514, 550, 638, 725, 1285, 1375, 1450, 1595, 2570, 2750, 2827, 3190, 3625, 5654, 6425, 7250, 7453, 7975, 12850, 14135, 14906, 15950, 28270, 32125, 37265, 39875, 64250, 70675, 74530, 79750, 81983, 141350, 163966, 186325, 353375, 372650, 409915, 706750, 819830, 931625, 1863250, 2049575, 4099150, 10247875, 20495750]

約数ペア:

[(1, 20495750), (2, 10247875), (5, 4099150), (10, 2049575), (11, 1863250), (22, 931625), (25, 819830), (29, 706750), (50, 409915), (55, 372650), (58, 353375), (110, 186325), (125, 163966), (145, 141350), (250, 81983), (257, 79750), (275, 74530), (290, 70675), (319, 64250), (514, 39875), (550, 37265), (638, 32125), (725, 28270), (1285, 15950), (1375, 14906), (1450, 14135), (1595, 12850), (2570, 7975), (2750, 7453), (2827, 7250), (3190, 6425), (3625, 5654)]