21040240

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{20231}}^1$

素因数の和:20257

約数の個数: 40

約数和(自身を含む): 52684128

約数和(自身を除く): 31643888

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 20231, 40462, 80924, 101155, 161848, 202310, 263003, 323696, 404620, 526006, 809240, 1052012, 1315015, 1618480, 2104024, 2630030, 4208048, 5260060, 10520120, 21040240]

約数ペア:

[(1, 21040240), (2, 10520120), (4, 5260060), (5, 4208048), (8, 2630030), (10, 2104024), (13, 1618480), (16, 1315015), (20, 1052012), (26, 809240), (40, 526006), (52, 404620), (65, 323696), (80, 263003), (104, 202310), (130, 161848), (208, 101155), (260, 80924), (520, 40462), (1040, 20231)]