81312380

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{131149}}^1$

素因数の和:131189

約数の個数: 24

約数和(自身を含む): 176265600

約数和(自身を除く): 94953220

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 131149, 262298, 524596, 655745, 1311490, 2622980, 4065619, 8131238, 16262476, 20328095, 40656190, 81312380]

約数ペア:

[(1, 81312380), (2, 40656190), (4, 20328095), (5, 16262476), (10, 8131238), (20, 4065619), (31, 2622980), (62, 1311490), (124, 655745), (155, 524596), (310, 262298), (620, 131149)]