20968395

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^2\times {\mathrm{691}}^1$

素因数の和:740

約数の個数: 48

約数和(自身を含む): 40789248

約数和(自身を除く): 19820853

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 51, 85, 105, 119, 255, 289, 357, 595, 691, 867, 1445, 1785, 2023, 2073, 3455, 4335, 4837, 6069, 10115, 10365, 11747, 14511, 24185, 30345, 35241, 58735, 72555, 82229, 176205, 199699, 246687, 411145, 599097, 998495, 1233435, 1397893, 2995485, 4193679, 6989465, 20968395]

約数ペア:

[(1, 20968395), (3, 6989465), (5, 4193679), (7, 2995485), (15, 1397893), (17, 1233435), (21, 998495), (35, 599097), (51, 411145), (85, 246687), (105, 199699), (119, 176205), (255, 82229), (289, 72555), (357, 58735), (595, 35241), (691, 30345), (867, 24185), (1445, 14511), (1785, 11747), (2023, 10365), (2073, 10115), (3455, 6069), (4335, 4837)]