18721998

素因数分解:

$2^1\times 3^2\times {\mathrm{17}}^2\times {\mathrm{59}}^1\times {\mathrm{61}}^1$

素因数の和:162

約数の個数: 72

約数和(自身を含む): 44539560

約数和(自身を除く): 25817562

約数列:

[1, 2, 3, 6, 9, 17, 18, 34, 51, 59, 61, 102, 118, 122, 153, 177, 183, 289, 306, 354, 366, 531, 549, 578, 867, 1003, 1037, 1062, 1098, 1734, 2006, 2074, 2601, 3009, 3111, 3599, 5202, 6018, 6222, 7198, 9027, 9333, 10797, 17051, 17629, 18054, 18666, 21594, 32391, 34102, 35258, 51153, 52887, 61183, 64782, 102306, 105774, 122366, 153459, 158661, 183549, 306918, 317322, 367098, 550647, 1040111, 1101294, 2080222, 3120333, 6240666, 9360999, 18721998]

約数ペア:

[(1, 18721998), (2, 9360999), (3, 6240666), (6, 3120333), (9, 2080222), (17, 1101294), (18, 1040111), (34, 550647), (51, 367098), (59, 317322), (61, 306918), (102, 183549), (118, 158661), (122, 153459), (153, 122366), (177, 105774), (183, 102306), (289, 64782), (306, 61183), (354, 52887), (366, 51153), (531, 35258), (549, 34102), (578, 32391), (867, 21594), (1003, 18666), (1037, 18054), (1062, 17629), (1098, 17051), (1734, 10797), (2006, 9333), (2074, 9027), (2601, 7198), (3009, 6222), (3111, 6018), (3599, 5202)]