21890510

素因数分解:

$2^1\times 5^1\times {\mathrm{73}}^1\times {\mathrm{157}}^1\times {\mathrm{191}}^1$

素因数の和:428

約数の個数: 32

約数和(自身を含む): 40407552

約数和(自身を除く): 18517042

約数列:

[1, 2, 5, 10, 73, 146, 157, 191, 314, 365, 382, 730, 785, 955, 1570, 1910, 11461, 13943, 22922, 27886, 29987, 57305, 59974, 69715, 114610, 139430, 149935, 299870, 2189051, 4378102, 10945255, 21890510]

約数ペア:

[(1, 21890510), (2, 10945255), (5, 4378102), (10, 2189051), (73, 299870), (146, 149935), (157, 139430), (191, 114610), (314, 69715), (365, 59974), (382, 57305), (730, 29987), (785, 27886), (955, 22922), (1570, 13943), (1910, 11461)]