18042970

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{97}}^1$

素因数の和:223

約数の個数: 64

約数和(自身を含む): 38102400

約数和(自身を除く): 20059430

約数列:

[1, 2, 5, 10, 11, 19, 22, 38, 55, 89, 95, 97, 110, 178, 190, 194, 209, 418, 445, 485, 890, 970, 979, 1045, 1067, 1691, 1843, 1958, 2090, 2134, 3382, 3686, 4895, 5335, 8455, 8633, 9215, 9790, 10670, 16910, 17266, 18430, 18601, 20273, 37202, 40546, 43165, 86330, 93005, 94963, 101365, 164027, 186010, 189926, 202730, 328054, 474815, 820135, 949630, 1640270, 1804297, 3608594, 9021485, 18042970]

約数ペア:

[(1, 18042970), (2, 9021485), (5, 3608594), (10, 1804297), (11, 1640270), (19, 949630), (22, 820135), (38, 474815), (55, 328054), (89, 202730), (95, 189926), (97, 186010), (110, 164027), (178, 101365), (190, 94963), (194, 93005), (209, 86330), (418, 43165), (445, 40546), (485, 37202), (890, 20273), (970, 18601), (979, 18430), (1045, 17266), (1067, 16910), (1691, 10670), (1843, 9790), (1958, 9215), (2090, 8633), (2134, 8455), (3382, 5335), (3686, 4895)]