18778720

素因数分解:

$2^5\times 5^1\times {\mathrm{241}}^1\times {\mathrm{487}}^1$

素因数の和:743

約数の個数: 48

約数和(自身を含む): 44640288

約数和(自身を除く): 25861568

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 241, 482, 487, 964, 974, 1205, 1928, 1948, 2410, 2435, 3856, 3896, 4820, 4870, 7712, 7792, 9640, 9740, 15584, 19280, 19480, 38560, 38960, 77920, 117367, 234734, 469468, 586835, 938936, 1173670, 1877872, 2347340, 3755744, 4694680, 9389360, 18778720]

約数ペア:

[(1, 18778720), (2, 9389360), (4, 4694680), (5, 3755744), (8, 2347340), (10, 1877872), (16, 1173670), (20, 938936), (32, 586835), (40, 469468), (80, 234734), (160, 117367), (241, 77920), (482, 38960), (487, 38560), (964, 19480), (974, 19280), (1205, 15584), (1928, 9740), (1948, 9640), (2410, 7792), (2435, 7712), (3856, 4870), (3896, 4820)]