21509080

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{673}}^1$

素因数の和:748

約数の個数: 64

約数和(自身を含む): 52410240

約数和(自身を除く): 30901160

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 47, 68, 85, 94, 136, 170, 188, 235, 340, 376, 470, 673, 680, 799, 940, 1346, 1598, 1880, 2692, 3196, 3365, 3995, 5384, 6392, 6730, 7990, 11441, 13460, 15980, 22882, 26920, 31631, 31960, 45764, 57205, 63262, 91528, 114410, 126524, 158155, 228820, 253048, 316310, 457640, 537727, 632620, 1075454, 1265240, 2150908, 2688635, 4301816, 5377270, 10754540, 21509080]

約数ペア:

[(1, 21509080), (2, 10754540), (4, 5377270), (5, 4301816), (8, 2688635), (10, 2150908), (17, 1265240), (20, 1075454), (34, 632620), (40, 537727), (47, 457640), (68, 316310), (85, 253048), (94, 228820), (136, 158155), (170, 126524), (188, 114410), (235, 91528), (340, 63262), (376, 57205), (470, 45764), (673, 31960), (680, 31631), (799, 26920), (940, 22882), (1346, 15980), (1598, 13460), (1880, 11441), (2692, 7990), (3196, 6730), (3365, 6392), (3995, 5384)]