128437480

素因数分解:

$2^3\times 5^1\times {\mathrm{163}}^1\times {\mathrm{19699}}^1$

素因数の和:19873

約数の個数: 32

約数和(自身を含む): 290772000

約数和(自身を除く): 162334520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 163, 326, 652, 815, 1304, 1630, 3260, 6520, 19699, 39398, 78796, 98495, 157592, 196990, 393980, 787960, 3210937, 6421874, 12843748, 16054685, 25687496, 32109370, 64218740, 128437480]

約数ペア:

[(1, 128437480), (2, 64218740), (4, 32109370), (5, 25687496), (8, 16054685), (10, 12843748), (20, 6421874), (40, 3210937), (163, 787960), (326, 393980), (652, 196990), (815, 157592), (1304, 98495), (1630, 78796), (3260, 39398), (6520, 19699)]