199987880

素因数分解:

$2^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{68489}}^1$

素因数の和:68573

約数の個数: 32

約数和(自身を含む): 456143400

約数和(自身を除く): 256155520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 73, 146, 292, 365, 584, 730, 1460, 2920, 68489, 136978, 273956, 342445, 547912, 684890, 1369780, 2739560, 4999697, 9999394, 19998788, 24998485, 39997576, 49996970, 99993940, 199987880]

約数ペア:

[(1, 199987880), (2, 99993940), (4, 49996970), (5, 39997576), (8, 24998485), (10, 19998788), (20, 9999394), (40, 4999697), (73, 2739560), (146, 1369780), (292, 684890), (365, 547912), (584, 342445), (730, 273956), (1460, 136978), (2920, 68489)]