20851990

素因数分解:

$2^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{683}}^1$

素因数の和:804

約数の個数: 32

約数和(自身を含む): 39004416

約数和(自身を除く): 18152426

約数列:

[1, 2, 5, 10, 43, 71, 86, 142, 215, 355, 430, 683, 710, 1366, 3053, 3415, 6106, 6830, 15265, 29369, 30530, 48493, 58738, 96986, 146845, 242465, 293690, 484930, 2085199, 4170398, 10425995, 20851990]

約数ペア:

[(1, 20851990), (2, 10425995), (5, 4170398), (10, 2085199), (43, 484930), (71, 293690), (86, 242465), (142, 146845), (215, 96986), (355, 58738), (430, 48493), (683, 30530), (710, 29369), (1366, 15265), (3053, 6830), (3415, 6106)]