128465720

素因数分解:

$2^3\times 5^1\times {\mathrm{103}}^1\times {\mathrm{31181}}^1$

素因数の和:31295

約数の個数: 32

約数和(自身を含む): 291863520

約数和(自身を除く): 163397800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 103, 206, 412, 515, 824, 1030, 2060, 4120, 31181, 62362, 124724, 155905, 249448, 311810, 623620, 1247240, 3211643, 6423286, 12846572, 16058215, 25693144, 32116430, 64232860, 128465720]

約数ペア:

[(1, 128465720), (2, 64232860), (4, 32116430), (5, 25693144), (8, 16058215), (10, 12846572), (20, 6423286), (40, 3211643), (103, 1247240), (206, 623620), (412, 311810), (515, 249448), (824, 155905), (1030, 124724), (2060, 62362), (4120, 31181)]