129560

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1$

素因数の和:131

約数の個数: 32

約数和(自身を含む): 302400

約数和(自身を除く): 172840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 79, 82, 158, 164, 205, 316, 328, 395, 410, 632, 790, 820, 1580, 1640, 3160, 3239, 6478, 12956, 16195, 25912, 32390, 64780, 129560]

約数ペア:

[(1, 129560), (2, 64780), (4, 32390), (5, 25912), (8, 16195), (10, 12956), (20, 6478), (40, 3239), (41, 3160), (79, 1640), (82, 1580), (158, 820), (164, 790), (205, 632), (316, 410), (328, 395)]