400000040

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{909091}}^1$

素因数の和:909113

約数の個数: 32

約数和(自身を含む): 981819360

約数和(自身を除く): 581819320

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 909091, 1818182, 3636364, 4545455, 7272728, 9090910, 10000001, 18181820, 20000002, 36363640, 40000004, 50000005, 80000008, 100000010, 200000020, 400000040]

約数ペア:

[(1, 400000040), (2, 200000020), (4, 100000010), (5, 80000008), (8, 50000005), (10, 40000004), (11, 36363640), (20, 20000002), (22, 18181820), (40, 10000001), (44, 9090910), (55, 7272728), (88, 4545455), (110, 3636364), (220, 1818182), (440, 909091)]