80871980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{30403}}^1$

素因数の和:30438

約数の個数: 48

約数和(自身を含む): 204314880

約数和(自身を除く): 123442900

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 70, 76, 95, 133, 140, 190, 266, 380, 532, 665, 1330, 2660, 30403, 60806, 121612, 152015, 212821, 304030, 425642, 577657, 608060, 851284, 1064105, 1155314, 2128210, 2310628, 2888285, 4043599, 4256420, 5776570, 8087198, 11553140, 16174396, 20217995, 40435990, 80871980]

約数ペア:

[(1, 80871980), (2, 40435990), (4, 20217995), (5, 16174396), (7, 11553140), (10, 8087198), (14, 5776570), (19, 4256420), (20, 4043599), (28, 2888285), (35, 2310628), (38, 2128210), (70, 1155314), (76, 1064105), (95, 851284), (133, 608060), (140, 577657), (190, 425642), (266, 304030), (380, 212821), (532, 152015), (665, 121612), (1330, 60806), (2660, 30403)]