401020720

素因数分解:

$2^4\times 5^1\times {\mathrm{281}}^1\times {\mathrm{17839}}^1$

素因数の和:18133

約数の個数: 40

約数和(自身を含む): 935743680

約数和(自身を除く): 534722960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 281, 562, 1124, 1405, 2248, 2810, 4496, 5620, 11240, 17839, 22480, 35678, 71356, 89195, 142712, 178390, 285424, 356780, 713560, 1427120, 5012759, 10025518, 20051036, 25063795, 40102072, 50127590, 80204144, 100255180, 200510360, 401020720]

約数ペア:

[(1, 401020720), (2, 200510360), (4, 100255180), (5, 80204144), (8, 50127590), (10, 40102072), (16, 25063795), (20, 20051036), (40, 10025518), (80, 5012759), (281, 1427120), (562, 713560), (1124, 356780), (1405, 285424), (2248, 178390), (2810, 142712), (4496, 89195), (5620, 71356), (11240, 35678), (17839, 22480)]