21492080

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{15803}}^1$

素因数の和:15833

約数の個数: 40

約数和(自身を含む): 52911792

約数和(自身を除く): 31419712

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 15803, 31606, 63212, 79015, 126424, 158030, 252848, 268651, 316060, 537302, 632120, 1074604, 1264240, 1343255, 2149208, 2686510, 4298416, 5373020, 10746040, 21492080]

約数ペア:

[(1, 21492080), (2, 10746040), (4, 5373020), (5, 4298416), (8, 2686510), (10, 2149208), (16, 1343255), (17, 1264240), (20, 1074604), (34, 632120), (40, 537302), (68, 316060), (80, 268651), (85, 252848), (136, 158030), (170, 126424), (272, 79015), (340, 63212), (680, 31606), (1360, 15803)]