21173920

素因数分解:

$2^5\times 5^1\times {\mathrm{59}}^1\times {\mathrm{2243}}^1$

素因数の和:2317

約数の個数: 48

約数和(自身を含む): 50893920

約数和(自身を除く): 29720000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 59, 80, 118, 160, 236, 295, 472, 590, 944, 1180, 1888, 2243, 2360, 4486, 4720, 8972, 9440, 11215, 17944, 22430, 35888, 44860, 71776, 89720, 132337, 179440, 264674, 358880, 529348, 661685, 1058696, 1323370, 2117392, 2646740, 4234784, 5293480, 10586960, 21173920]

約数ペア:

[(1, 21173920), (2, 10586960), (4, 5293480), (5, 4234784), (8, 2646740), (10, 2117392), (16, 1323370), (20, 1058696), (32, 661685), (40, 529348), (59, 358880), (80, 264674), (118, 179440), (160, 132337), (236, 89720), (295, 71776), (472, 44860), (590, 35888), (944, 22430), (1180, 17944), (1888, 11215), (2243, 9440), (2360, 8972), (4486, 4720)]