21439280

素因数分解:

$2^4\times 5^1\times {\mathrm{37}}^1\times {\mathrm{7243}}^1$

素因数の和:7293

約数の個数: 40

約数和(自身を含む): 51200592

約数和(自身を除く): 29761312

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 37, 40, 74, 80, 148, 185, 296, 370, 592, 740, 1480, 2960, 7243, 14486, 28972, 36215, 57944, 72430, 115888, 144860, 267991, 289720, 535982, 579440, 1071964, 1339955, 2143928, 2679910, 4287856, 5359820, 10719640, 21439280]

約数ペア:

[(1, 21439280), (2, 10719640), (4, 5359820), (5, 4287856), (8, 2679910), (10, 2143928), (16, 1339955), (20, 1071964), (37, 579440), (40, 535982), (74, 289720), (80, 267991), (148, 144860), (185, 115888), (296, 72430), (370, 57944), (592, 36215), (740, 28972), (1480, 14486), (2960, 7243)]