21282040

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{40927}}^1$

素因数の和:40951

約数の個数: 32

約数和(自身を含む): 51569280

約数和(自身を除く): 30287240

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 40927, 81854, 163708, 204635, 327416, 409270, 532051, 818540, 1064102, 1637080, 2128204, 2660255, 4256408, 5320510, 10641020, 21282040]

約数ペア:

[(1, 21282040), (2, 10641020), (4, 5320510), (5, 4256408), (8, 2660255), (10, 2128204), (13, 1637080), (20, 1064102), (26, 818540), (40, 532051), (52, 409270), (65, 327416), (104, 204635), (130, 163708), (260, 81854), (520, 40927)]