20945050

素因数分解:

$2^1\times 5^2\times 7^2\times {\mathrm{83}}^1\times {\mathrm{103}}^1$

素因数の和:212

約数の個数: 72

約数和(自身を含む): 46309536

約数和(自身を除く): 25364486

約数列:

[1, 2, 5, 7, 10, 14, 25, 35, 49, 50, 70, 83, 98, 103, 166, 175, 206, 245, 350, 415, 490, 515, 581, 721, 830, 1030, 1162, 1225, 1442, 2075, 2450, 2575, 2905, 3605, 4067, 4150, 5047, 5150, 5810, 7210, 8134, 8549, 10094, 14525, 17098, 18025, 20335, 25235, 29050, 36050, 40670, 42745, 50470, 59843, 85490, 101675, 119686, 126175, 203350, 213725, 252350, 299215, 418901, 427450, 598430, 837802, 1496075, 2094505, 2992150, 4189010, 10472525, 20945050]

約数ペア:

[(1, 20945050), (2, 10472525), (5, 4189010), (7, 2992150), (10, 2094505), (14, 1496075), (25, 837802), (35, 598430), (49, 427450), (50, 418901), (70, 299215), (83, 252350), (98, 213725), (103, 203350), (166, 126175), (175, 119686), (206, 101675), (245, 85490), (350, 59843), (415, 50470), (490, 42745), (515, 40670), (581, 36050), (721, 29050), (830, 25235), (1030, 20335), (1162, 18025), (1225, 17098), (1442, 14525), (2075, 10094), (2450, 8549), (2575, 8134), (2905, 7210), (3605, 5810), (4067, 5150), (4150, 5047)]