999020

素因数分解:

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

素因数の和:278

約数の個数: 48

約数和(自身を含む): 2419200

約数和(自身を除く): 1420180

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 55, 76, 95, 110, 190, 209, 220, 239, 380, 418, 478, 836, 956, 1045, 1195, 2090, 2390, 2629, 4180, 4541, 4780, 5258, 9082, 10516, 13145, 18164, 22705, 26290, 45410, 49951, 52580, 90820, 99902, 199804, 249755, 499510, 999020]

約数ペア:

[(1, 999020), (2, 499510), (4, 249755), (5, 199804), (10, 99902), (11, 90820), (19, 52580), (20, 49951), (22, 45410), (38, 26290), (44, 22705), (55, 18164), (76, 13145), (95, 10516), (110, 9082), (190, 5258), (209, 4780), (220, 4541), (239, 4180), (380, 2629), (418, 2390), (478, 2090), (836, 1195), (956, 1045)]