80021500

素因数分解:

$2^2\times 5^3\times {\mathrm{13}}^2\times {\mathrm{947}}^1$

素因数の和:992

約数の個数: 72

約数和(自身を含む): 189444528

約数和(自身を除く): 109423028

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 125, 130, 169, 250, 260, 325, 338, 500, 650, 676, 845, 947, 1300, 1625, 1690, 1894, 3250, 3380, 3788, 4225, 4735, 6500, 8450, 9470, 12311, 16900, 18940, 21125, 23675, 24622, 42250, 47350, 49244, 61555, 84500, 94700, 118375, 123110, 160043, 236750, 246220, 307775, 320086, 473500, 615550, 640172, 800215, 1231100, 1538875, 1600430, 3077750, 3200860, 4001075, 6155500, 8002150, 16004300, 20005375, 40010750, 80021500]

約数ペア:

[(1, 80021500), (2, 40010750), (4, 20005375), (5, 16004300), (10, 8002150), (13, 6155500), (20, 4001075), (25, 3200860), (26, 3077750), (50, 1600430), (52, 1538875), (65, 1231100), (100, 800215), (125, 640172), (130, 615550), (169, 473500), (250, 320086), (260, 307775), (325, 246220), (338, 236750), (500, 160043), (650, 123110), (676, 118375), (845, 94700), (947, 84500), (1300, 61555), (1625, 49244), (1690, 47350), (1894, 42250), (3250, 24622), (3380, 23675), (3788, 21125), (4225, 18940), (4735, 16900), (6500, 12311), (8450, 9470)]