129999920

素因数分解:

$2^4\times 5^1\times {\mathrm{521}}^1\times {\mathrm{3119}}^1$

素因数の和:3653

約数の個数: 40

約数和(自身を含む): 302927040

約数和(自身を除く): 172927120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 521, 1042, 2084, 2605, 3119, 4168, 5210, 6238, 8336, 10420, 12476, 15595, 20840, 24952, 31190, 41680, 49904, 62380, 124760, 249520, 1624999, 3249998, 6499996, 8124995, 12999992, 16249990, 25999984, 32499980, 64999960, 129999920]

約数ペア:

[(1, 129999920), (2, 64999960), (4, 32499980), (5, 25999984), (8, 16249990), (10, 12999992), (16, 8124995), (20, 6499996), (40, 3249998), (80, 1624999), (521, 249520), (1042, 124760), (2084, 62380), (2605, 49904), (3119, 41680), (4168, 31190), (5210, 24952), (6238, 20840), (8336, 15595), (10420, 12476)]