1998040

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{239}}^1$

素因数の和:280

約数の個数: 64

約数和(自身を含む): 5184000

約数和(自身を除く): 3185960

約数列:

[1, 2, 4, 5, 8, 10, 11, 19, 20, 22, 38, 40, 44, 55, 76, 88, 95, 110, 152, 190, 209, 220, 239, 380, 418, 440, 478, 760, 836, 956, 1045, 1195, 1672, 1912, 2090, 2390, 2629, 4180, 4541, 4780, 5258, 8360, 9082, 9560, 10516, 13145, 18164, 21032, 22705, 26290, 36328, 45410, 49951, 52580, 90820, 99902, 105160, 181640, 199804, 249755, 399608, 499510, 999020, 1998040]

約数ペア:

[(1, 1998040), (2, 999020), (4, 499510), (5, 399608), (8, 249755), (10, 199804), (11, 181640), (19, 105160), (20, 99902), (22, 90820), (38, 52580), (40, 49951), (44, 45410), (55, 36328), (76, 26290), (88, 22705), (95, 21032), (110, 18164), (152, 13145), (190, 10516), (209, 9560), (220, 9082), (239, 8360), (380, 5258), (418, 4780), (440, 4541), (478, 4180), (760, 2629), (836, 2390), (956, 2090), (1045, 1912), (1195, 1672)]