21398260

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{82301}}^1$

素因数の和:82323

約数の個数: 24

約数和(自身を含む): 48393576

約数和(自身を除く): 26995316

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 82301, 164602, 329204, 411505, 823010, 1069913, 1646020, 2139826, 4279652, 5349565, 10699130, 21398260]

約数ペア:

[(1, 21398260), (2, 10699130), (4, 5349565), (5, 4279652), (10, 2139826), (13, 1646020), (20, 1069913), (26, 823010), (52, 411505), (65, 329204), (130, 164602), (260, 82301)]