17981840

素因数分解:

$2^4\times 5^1\times {\mathrm{53}}^1\times {\mathrm{4241}}^1$

素因数の和:4307

約数の個数: 40

約数和(自身を含む): 42606648

約数和(自身を除く): 24624808

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 53, 80, 106, 212, 265, 424, 530, 848, 1060, 2120, 4240, 4241, 8482, 16964, 21205, 33928, 42410, 67856, 84820, 169640, 224773, 339280, 449546, 899092, 1123865, 1798184, 2247730, 3596368, 4495460, 8990920, 17981840]

約数ペア:

[(1, 17981840), (2, 8990920), (4, 4495460), (5, 3596368), (8, 2247730), (10, 1798184), (16, 1123865), (20, 899092), (40, 449546), (53, 339280), (80, 224773), (106, 169640), (212, 84820), (265, 67856), (424, 42410), (530, 33928), (848, 21205), (1060, 16964), (2120, 8482), (4240, 4241)]