18762980

素因数分解:

$2^2\times 5^1\times {\mathrm{83}}^1\times {\mathrm{89}}^1\times {\mathrm{127}}^1$

素因数の和:308

約数の個数: 48

約数和(自身を含む): 40642560

約数和(自身を除く): 21879580

約数列:

[1, 2, 4, 5, 10, 20, 83, 89, 127, 166, 178, 254, 332, 356, 415, 445, 508, 635, 830, 890, 1270, 1660, 1780, 2540, 7387, 10541, 11303, 14774, 21082, 22606, 29548, 36935, 42164, 45212, 52705, 56515, 73870, 105410, 113030, 147740, 210820, 226060, 938149, 1876298, 3752596, 4690745, 9381490, 18762980]

約数ペア:

[(1, 18762980), (2, 9381490), (4, 4690745), (5, 3752596), (10, 1876298), (20, 938149), (83, 226060), (89, 210820), (127, 147740), (166, 113030), (178, 105410), (254, 73870), (332, 56515), (356, 52705), (415, 45212), (445, 42164), (508, 36935), (635, 29548), (830, 22606), (890, 21082), (1270, 14774), (1660, 11303), (1780, 10541), (2540, 7387)]