639403780

素因数分解:

$2^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{83}}^1\times {\mathrm{5749}}^1$

素因数の和:5908

約数の個数: 48

約数和(自身を含む): 1379448000

約数和(自身を除く): 740044220

約数列:

[1, 2, 4, 5, 10, 20, 67, 83, 134, 166, 268, 332, 335, 415, 670, 830, 1340, 1660, 5561, 5749, 11122, 11498, 22244, 22996, 27805, 28745, 55610, 57490, 111220, 114980, 385183, 477167, 770366, 954334, 1540732, 1908668, 1925915, 2385835, 3851830, 4771670, 7703660, 9543340, 31970189, 63940378, 127880756, 159850945, 319701890, 639403780]

約数ペア:

[(1, 639403780), (2, 319701890), (4, 159850945), (5, 127880756), (10, 63940378), (20, 31970189), (67, 9543340), (83, 7703660), (134, 4771670), (166, 3851830), (268, 2385835), (332, 1925915), (335, 1908668), (415, 1540732), (670, 954334), (830, 770366), (1340, 477167), (1660, 385183), (5561, 114980), (5749, 111220), (11122, 57490), (11498, 55610), (22244, 28745), (22996, 27805)]