17851880

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{97}}^1\times {\mathrm{107}}^1$

素因数の和:258

約数の個数: 64

約数和(自身を含む): 41912640

約数和(自身を除く): 24060760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 97, 107, 172, 194, 214, 215, 344, 388, 428, 430, 485, 535, 776, 856, 860, 970, 1070, 1720, 1940, 2140, 3880, 4171, 4280, 4601, 8342, 9202, 10379, 16684, 18404, 20758, 20855, 23005, 33368, 36808, 41516, 41710, 46010, 51895, 83032, 83420, 92020, 103790, 166840, 184040, 207580, 415160, 446297, 892594, 1785188, 2231485, 3570376, 4462970, 8925940, 17851880]

約数ペア:

[(1, 17851880), (2, 8925940), (4, 4462970), (5, 3570376), (8, 2231485), (10, 1785188), (20, 892594), (40, 446297), (43, 415160), (86, 207580), (97, 184040), (107, 166840), (172, 103790), (194, 92020), (214, 83420), (215, 83032), (344, 51895), (388, 46010), (428, 41710), (430, 41516), (485, 36808), (535, 33368), (776, 23005), (856, 20855), (860, 20758), (970, 18404), (1070, 16684), (1720, 10379), (1940, 9202), (2140, 8342), (3880, 4601), (4171, 4280)]