20867500

素因数分解:

$2^2\times 5^4\times {\mathrm{17}}^1\times {\mathrm{491}}^1$

素因数の和:532

約数の個数: 60

約数和(自身を含む): 48415752

約数和(自身を除く): 27548252

約数列:

[1, 2, 4, 5, 10, 17, 20, 25, 34, 50, 68, 85, 100, 125, 170, 250, 340, 425, 491, 500, 625, 850, 982, 1250, 1700, 1964, 2125, 2455, 2500, 4250, 4910, 8347, 8500, 9820, 10625, 12275, 16694, 21250, 24550, 33388, 41735, 42500, 49100, 61375, 83470, 122750, 166940, 208675, 245500, 306875, 417350, 613750, 834700, 1043375, 1227500, 2086750, 4173500, 5216875, 10433750, 20867500]

約数ペア:

[(1, 20867500), (2, 10433750), (4, 5216875), (5, 4173500), (10, 2086750), (17, 1227500), (20, 1043375), (25, 834700), (34, 613750), (50, 417350), (68, 306875), (85, 245500), (100, 208675), (125, 166940), (170, 122750), (250, 83470), (340, 61375), (425, 49100), (491, 42500), (500, 41735), (625, 33388), (850, 24550), (982, 21250), (1250, 16694), (1700, 12275), (1964, 10625), (2125, 9820), (2455, 8500), (2500, 8347), (4250, 4910)]