20885840

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{11351}}^1$

素因数の和:11387

約数の個数: 40

約数和(自身を含む): 50675328

約数和(自身を除く): 29789488

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 46, 80, 92, 115, 184, 230, 368, 460, 920, 1840, 11351, 22702, 45404, 56755, 90808, 113510, 181616, 227020, 261073, 454040, 522146, 908080, 1044292, 1305365, 2088584, 2610730, 4177168, 5221460, 10442920, 20885840]

約数ペア:

[(1, 20885840), (2, 10442920), (4, 5221460), (5, 4177168), (8, 2610730), (10, 2088584), (16, 1305365), (20, 1044292), (23, 908080), (40, 522146), (46, 454040), (80, 261073), (92, 227020), (115, 181616), (184, 113510), (230, 90808), (368, 56755), (460, 45404), (920, 22702), (1840, 11351)]