20172952840

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{647399}}^1$

素因数の和:647470

約数の個数: 64

約数和(自身を含む): 48943440000

約数和(自身を除く): 28770487160

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 41, 76, 82, 95, 152, 164, 190, 205, 328, 380, 410, 760, 779, 820, 1558, 1640, 3116, 3895, 6232, 7790, 15580, 31160, 647399, 1294798, 2589596, 3236995, 5179192, 6473990, 12300581, 12947980, 24601162, 25895960, 26543359, 49202324, 53086718, 61502905, 98404648, 106173436, 123005810, 132716795, 212346872, 246011620, 265433590, 492023240, 504323821, 530867180, 1008647642, 1061734360, 2017295284, 2521619105, 4034590568, 5043238210, 10086476420, 20172952840]

約数ペア:

[(1, 20172952840), (2, 10086476420), (4, 5043238210), (5, 4034590568), (8, 2521619105), (10, 2017295284), (19, 1061734360), (20, 1008647642), (38, 530867180), (40, 504323821), (41, 492023240), (76, 265433590), (82, 246011620), (95, 212346872), (152, 132716795), (164, 123005810), (190, 106173436), (205, 98404648), (328, 61502905), (380, 53086718), (410, 49202324), (760, 26543359), (779, 25895960), (820, 24601162), (1558, 12947980), (1640, 12300581), (3116, 6473990), (3895, 5179192), (6232, 3236995), (7790, 2589596), (15580, 1294798), (31160, 647399)]