18378918

素因数分解:

$2^1\times 3^2\times {\mathrm{71}}^1\times {\mathrm{73}}^1\times {\mathrm{197}}^1$

素因数の和:349

約数の個数: 48

約数和(自身を含む): 41142816

約数和(自身を除く): 22763898

約数列:

[1, 2, 3, 6, 9, 18, 71, 73, 142, 146, 197, 213, 219, 394, 426, 438, 591, 639, 657, 1182, 1278, 1314, 1773, 3546, 5183, 10366, 13987, 14381, 15549, 27974, 28762, 31098, 41961, 43143, 46647, 83922, 86286, 93294, 125883, 129429, 251766, 258858, 1021051, 2042102, 3063153, 6126306, 9189459, 18378918]

約数ペア:

[(1, 18378918), (2, 9189459), (3, 6126306), (6, 3063153), (9, 2042102), (18, 1021051), (71, 258858), (73, 251766), (142, 129429), (146, 125883), (197, 93294), (213, 86286), (219, 83922), (394, 46647), (426, 43143), (438, 41961), (591, 31098), (639, 28762), (657, 27974), (1182, 15549), (1278, 14381), (1314, 13987), (1773, 10366), (3546, 5183)]