819997540

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{757}}^1\times {\mathrm{1321}}^1$

素因数の和:2128

約数の個数: 48

約数和(自身を含む): 1767662064

約数和(自身を除く): 947664524

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 757, 820, 1321, 1514, 2642, 3028, 3785, 5284, 6605, 7570, 13210, 15140, 26420, 31037, 54161, 62074, 108322, 124148, 155185, 216644, 270805, 310370, 541610, 620740, 999997, 1083220, 1999994, 3999988, 4999985, 9999970, 19999940, 40999877, 81999754, 163999508, 204999385, 409998770, 819997540]

約数ペア:

[(1, 819997540), (2, 409998770), (4, 204999385), (5, 163999508), (10, 81999754), (20, 40999877), (41, 19999940), (82, 9999970), (164, 4999985), (205, 3999988), (410, 1999994), (757, 1083220), (820, 999997), (1321, 620740), (1514, 541610), (2642, 310370), (3028, 270805), (3785, 216644), (5284, 155185), (6605, 124148), (7570, 108322), (13210, 62074), (15140, 54161), (26420, 31037)]