31211720

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{21089}}^1$

素因数の和:21137

約数の個数: 32

約数和(自身を含む): 72127800

約数和(自身を除く): 40916080

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 148, 185, 296, 370, 740, 1480, 21089, 42178, 84356, 105445, 168712, 210890, 421780, 780293, 843560, 1560586, 3121172, 3901465, 6242344, 7802930, 15605860, 31211720]

約数ペア:

[(1, 31211720), (2, 15605860), (4, 7802930), (5, 6242344), (8, 3901465), (10, 3121172), (20, 1560586), (37, 843560), (40, 780293), (74, 421780), (148, 210890), (185, 168712), (296, 105445), (370, 84356), (740, 42178), (1480, 21089)]