21980175

素因数分解:

$3^1\times 5^2\times 7^2\times {\mathrm{5981}}^1$

素因数の和:6008

約数の個数: 36

約数和(自身を含む): 42280776

約数和(自身を除く): 20300601

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 49, 75, 105, 147, 175, 245, 525, 735, 1225, 3675, 5981, 17943, 29905, 41867, 89715, 125601, 149525, 209335, 293069, 448575, 628005, 879207, 1046675, 1465345, 3140025, 4396035, 7326725, 21980175]

約数ペア:

[(1, 21980175), (3, 7326725), (5, 4396035), (7, 3140025), (15, 1465345), (21, 1046675), (25, 879207), (35, 628005), (49, 448575), (75, 293069), (105, 209335), (147, 149525), (175, 125601), (245, 89715), (525, 41867), (735, 29905), (1225, 17943), (3675, 5981)]