21535280

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{20707}}^1$

素因数の和:20733

約数の個数: 40

約数和(自身を含む): 53923632

約数和(自身を除く): 32388352

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 20707, 41414, 82828, 103535, 165656, 207070, 269191, 331312, 414140, 538382, 828280, 1076764, 1345955, 1656560, 2153528, 2691910, 4307056, 5383820, 10767640, 21535280]

約数ペア:

[(1, 21535280), (2, 10767640), (4, 5383820), (5, 4307056), (8, 2691910), (10, 2153528), (13, 1656560), (16, 1345955), (20, 1076764), (26, 828280), (40, 538382), (52, 414140), (65, 331312), (80, 269191), (104, 207070), (130, 165656), (208, 103535), (260, 82828), (520, 41414), (1040, 20707)]