18132860

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{89}}^1\times {\mathrm{167}}^1$

素因数の和:326

約数の個数: 48

約数和(自身を含む): 39372480

約数和(自身を除く): 21239620

約数列:

[1, 2, 4, 5, 10, 20, 61, 89, 122, 167, 178, 244, 305, 334, 356, 445, 610, 668, 835, 890, 1220, 1670, 1780, 3340, 5429, 10187, 10858, 14863, 20374, 21716, 27145, 29726, 40748, 50935, 54290, 59452, 74315, 101870, 108580, 148630, 203740, 297260, 906643, 1813286, 3626572, 4533215, 9066430, 18132860]

約数ペア:

[(1, 18132860), (2, 9066430), (4, 4533215), (5, 3626572), (10, 1813286), (20, 906643), (61, 297260), (89, 203740), (122, 148630), (167, 108580), (178, 101870), (244, 74315), (305, 59452), (334, 54290), (356, 50935), (445, 40748), (610, 29726), (668, 27145), (835, 21716), (890, 20374), (1220, 14863), (1670, 10858), (1780, 10187), (3340, 5429)]