399039440

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{160903}}^1$

素因数の和:160947

約数の個数: 40

約数和(自身を含む): 957700608

約数和(自身を除く): 558661168

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 160903, 321806, 643612, 804515, 1287224, 1609030, 2574448, 3218060, 4987993, 6436120, 9975986, 12872240, 19951972, 24939965, 39903944, 49879930, 79807888, 99759860, 199519720, 399039440]

約数ペア:

[(1, 399039440), (2, 199519720), (4, 99759860), (5, 79807888), (8, 49879930), (10, 39903944), (16, 24939965), (20, 19951972), (31, 12872240), (40, 9975986), (62, 6436120), (80, 4987993), (124, 3218060), (155, 2574448), (248, 1609030), (310, 1287224), (496, 804515), (620, 643612), (1240, 321806), (2480, 160903)]