21170320

素因数分解:

$2^4\times 5^1\times {\mathrm{53}}^1\times {\mathrm{4993}}^1$

素因数の和:5059

約数の個数: 40

約数和(自身を含む): 50159736

約数和(自身を除く): 28989416

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 53, 80, 106, 212, 265, 424, 530, 848, 1060, 2120, 4240, 4993, 9986, 19972, 24965, 39944, 49930, 79888, 99860, 199720, 264629, 399440, 529258, 1058516, 1323145, 2117032, 2646290, 4234064, 5292580, 10585160, 21170320]

約数ペア:

[(1, 21170320), (2, 10585160), (4, 5292580), (5, 4234064), (8, 2646290), (10, 2117032), (16, 1323145), (20, 1058516), (40, 529258), (53, 399440), (80, 264629), (106, 199720), (212, 99860), (265, 79888), (424, 49930), (530, 39944), (848, 24965), (1060, 19972), (2120, 9986), (4240, 4993)]