21195560

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{12323}}^1$

素因数の和:12377

約数の個数: 32

約数和(自身を含む): 48803040

約数和(自身を除く): 27607480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 12323, 24646, 49292, 61615, 98584, 123230, 246460, 492920, 529889, 1059778, 2119556, 2649445, 4239112, 5298890, 10597780, 21195560]

約数ペア:

[(1, 21195560), (2, 10597780), (4, 5298890), (5, 4239112), (8, 2649445), (10, 2119556), (20, 1059778), (40, 529889), (43, 492920), (86, 246460), (172, 123230), (215, 98584), (344, 61615), (430, 49292), (860, 24646), (1720, 12323)]