81197920

素因数分解:

$2^5\times 5^1\times {\mathrm{191}}^1\times {\mathrm{2657}}^1$

素因数の和:2863

約数の個数: 48

約数和(自身を含む): 192907008

約数和(自身を除く): 111709088

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 191, 382, 764, 955, 1528, 1910, 2657, 3056, 3820, 5314, 6112, 7640, 10628, 13285, 15280, 21256, 26570, 30560, 42512, 53140, 85024, 106280, 212560, 425120, 507487, 1014974, 2029948, 2537435, 4059896, 5074870, 8119792, 10149740, 16239584, 20299480, 40598960, 81197920]

約数ペア:

[(1, 81197920), (2, 40598960), (4, 20299480), (5, 16239584), (8, 10149740), (10, 8119792), (16, 5074870), (20, 4059896), (32, 2537435), (40, 2029948), (80, 1014974), (160, 507487), (191, 425120), (382, 212560), (764, 106280), (955, 85024), (1528, 53140), (1910, 42512), (2657, 30560), (3056, 26570), (3820, 21256), (5314, 15280), (6112, 13285), (7640, 10628)]