20664800

素因数分解:

$2^5\times 5^2\times {\mathrm{13}}^1\times {\mathrm{1987}}^1$

素因数の和:2020

約数の個数: 72

約数和(自身を含む): 54355896

約数和(自身を除く): 33691096

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 32, 40, 50, 52, 65, 80, 100, 104, 130, 160, 200, 208, 260, 325, 400, 416, 520, 650, 800, 1040, 1300, 1987, 2080, 2600, 3974, 5200, 7948, 9935, 10400, 15896, 19870, 25831, 31792, 39740, 49675, 51662, 63584, 79480, 99350, 103324, 129155, 158960, 198700, 206648, 258310, 317920, 397400, 413296, 516620, 645775, 794800, 826592, 1033240, 1291550, 1589600, 2066480, 2583100, 4132960, 5166200, 10332400, 20664800]

約数ペア:

[(1, 20664800), (2, 10332400), (4, 5166200), (5, 4132960), (8, 2583100), (10, 2066480), (13, 1589600), (16, 1291550), (20, 1033240), (25, 826592), (26, 794800), (32, 645775), (40, 516620), (50, 413296), (52, 397400), (65, 317920), (80, 258310), (100, 206648), (104, 198700), (130, 158960), (160, 129155), (200, 103324), (208, 99350), (260, 79480), (325, 63584), (400, 51662), (416, 49675), (520, 39740), (650, 31792), (800, 25831), (1040, 19870), (1300, 15896), (1987, 10400), (2080, 9935), (2600, 7948), (3974, 5200)]