809888920

素因数分解:

$2^3\times 5^1\times {\mathrm{271}}^1\times {\mathrm{74713}}^1$

素因数の和:74995

約数の個数: 32

約数和(自身を含む): 1828998720

約数和(自身を除く): 1019109800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 271, 542, 1084, 1355, 2168, 2710, 5420, 10840, 74713, 149426, 298852, 373565, 597704, 747130, 1494260, 2988520, 20247223, 40494446, 80988892, 101236115, 161977784, 202472230, 404944460, 809888920]

約数ペア:

[(1, 809888920), (2, 404944460), (4, 202472230), (5, 161977784), (8, 101236115), (10, 80988892), (20, 40494446), (40, 20247223), (271, 2988520), (542, 1494260), (1084, 747130), (1355, 597704), (2168, 373565), (2710, 298852), (5420, 149426), (10840, 74713)]