80518780

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{2129}}^1$

素因数の和:2230

約数の個数: 48

約数和(自身を含む): 177488640

約数和(自身を除く): 96969860

約数列:

[1, 2, 4, 5, 10, 20, 31, 61, 62, 122, 124, 155, 244, 305, 310, 610, 620, 1220, 1891, 2129, 3782, 4258, 7564, 8516, 9455, 10645, 18910, 21290, 37820, 42580, 65999, 129869, 131998, 259738, 263996, 329995, 519476, 649345, 659990, 1298690, 1319980, 2597380, 4025939, 8051878, 16103756, 20129695, 40259390, 80518780]

約数ペア:

[(1, 80518780), (2, 40259390), (4, 20129695), (5, 16103756), (10, 8051878), (20, 4025939), (31, 2597380), (61, 1319980), (62, 1298690), (122, 659990), (124, 649345), (155, 519476), (244, 329995), (305, 263996), (310, 259738), (610, 131998), (620, 129869), (1220, 65999), (1891, 42580), (2129, 37820), (3782, 21290), (4258, 18910), (7564, 10645), (8516, 9455)]