18660280

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{571}}^1$

素因数の和:644

約数の個数: 64

約数和(自身を含む): 45302400

約数和(自身を除く): 26642120

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 43, 76, 86, 95, 152, 172, 190, 215, 344, 380, 430, 571, 760, 817, 860, 1142, 1634, 1720, 2284, 2855, 3268, 4085, 4568, 5710, 6536, 8170, 10849, 11420, 16340, 21698, 22840, 24553, 32680, 43396, 49106, 54245, 86792, 98212, 108490, 122765, 196424, 216980, 245530, 433960, 466507, 491060, 933014, 982120, 1866028, 2332535, 3732056, 4665070, 9330140, 18660280]

約数ペア:

[(1, 18660280), (2, 9330140), (4, 4665070), (5, 3732056), (8, 2332535), (10, 1866028), (19, 982120), (20, 933014), (38, 491060), (40, 466507), (43, 433960), (76, 245530), (86, 216980), (95, 196424), (152, 122765), (172, 108490), (190, 98212), (215, 86792), (344, 54245), (380, 49106), (430, 43396), (571, 32680), (760, 24553), (817, 22840), (860, 21698), (1142, 16340), (1634, 11420), (1720, 10849), (2284, 8170), (2855, 6536), (3268, 5710), (4085, 4568)]