20686250

素因数分解:

$2^1\times 5^4\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1$

素因数の和:121

約数の個数: 80

約数和(自身を含む): 44610720

約数和(自身を除く): 23924470

約数列:

[1, 2, 5, 10, 13, 19, 25, 26, 38, 50, 65, 67, 95, 125, 130, 134, 190, 247, 250, 325, 335, 475, 494, 625, 650, 670, 871, 950, 1235, 1250, 1273, 1625, 1675, 1742, 2375, 2470, 2546, 3250, 3350, 4355, 4750, 6175, 6365, 8125, 8375, 8710, 11875, 12350, 12730, 16250, 16549, 16750, 21775, 23750, 30875, 31825, 33098, 41875, 43550, 61750, 63650, 82745, 83750, 108875, 154375, 159125, 165490, 217750, 308750, 318250, 413725, 544375, 795625, 827450, 1088750, 1591250, 2068625, 4137250, 10343125, 20686250]

約数ペア:

[(1, 20686250), (2, 10343125), (5, 4137250), (10, 2068625), (13, 1591250), (19, 1088750), (25, 827450), (26, 795625), (38, 544375), (50, 413725), (65, 318250), (67, 308750), (95, 217750), (125, 165490), (130, 159125), (134, 154375), (190, 108875), (247, 83750), (250, 82745), (325, 63650), (335, 61750), (475, 43550), (494, 41875), (625, 33098), (650, 31825), (670, 30875), (871, 23750), (950, 21775), (1235, 16750), (1250, 16549), (1273, 16250), (1625, 12730), (1675, 12350), (1742, 11875), (2375, 8710), (2470, 8375), (2546, 8125), (3250, 6365), (3350, 6175), (4355, 4750)]