123920560

素因数分解:

$2^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{21817}}^1$

素因数の和:21901

約数の個数: 40

約数和(自身を含む): 292186656

約数和(自身を除く): 168266096

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 71, 80, 142, 284, 355, 568, 710, 1136, 1420, 2840, 5680, 21817, 43634, 87268, 109085, 174536, 218170, 349072, 436340, 872680, 1549007, 1745360, 3098014, 6196028, 7745035, 12392056, 15490070, 24784112, 30980140, 61960280, 123920560]

約数ペア:

[(1, 123920560), (2, 61960280), (4, 30980140), (5, 24784112), (8, 15490070), (10, 12392056), (16, 7745035), (20, 6196028), (40, 3098014), (71, 1745360), (80, 1549007), (142, 872680), (284, 436340), (355, 349072), (568, 218170), (710, 174536), (1136, 109085), (1420, 87268), (2840, 43634), (5680, 21817)]