21447880

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31541}}^1$

素因数の和:31569

約数の個数: 32

約数和(自身を含む): 51098040

約数和(自身を除く): 29650160

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 31541, 63082, 126164, 157705, 252328, 315410, 536197, 630820, 1072394, 1261640, 2144788, 2680985, 4289576, 5361970, 10723940, 21447880]

約数ペア:

[(1, 21447880), (2, 10723940), (4, 5361970), (5, 4289576), (8, 2680985), (10, 2144788), (17, 1261640), (20, 1072394), (34, 630820), (40, 536197), (68, 315410), (85, 252328), (136, 157705), (170, 126164), (340, 63082), (680, 31541)]