27880

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1$

素因数の和:69

約数の個数: 32

約数和(自身を含む): 68040

約数和(自身を除く): 40160

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 41, 68, 82, 85, 136, 164, 170, 205, 328, 340, 410, 680, 697, 820, 1394, 1640, 2788, 3485, 5576, 6970, 13940, 27880]

約数ペア:

[(1, 27880), (2, 13940), (4, 6970), (5, 5576), (8, 3485), (10, 2788), (17, 1640), (20, 1394), (34, 820), (40, 697), (41, 680), (68, 410), (82, 340), (85, 328), (136, 205), (164, 170)]