21515660

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^2\times {\mathrm{487}}^1$

素因数の和:590

約数の個数: 36

約数和(自身を含む): 46259472

約数和(自身を除く): 24743812

約数列:

[1, 2, 4, 5, 10, 20, 47, 94, 188, 235, 470, 487, 940, 974, 1948, 2209, 2435, 4418, 4870, 8836, 9740, 11045, 22090, 22889, 44180, 45778, 91556, 114445, 228890, 457780, 1075783, 2151566, 4303132, 5378915, 10757830, 21515660]

約数ペア:

[(1, 21515660), (2, 10757830), (4, 5378915), (5, 4303132), (10, 2151566), (20, 1075783), (47, 457780), (94, 228890), (188, 114445), (235, 91556), (470, 45778), (487, 44180), (940, 22889), (974, 22090), (1948, 11045), (2209, 9740), (2435, 8836), (4418, 4870)]