21785680

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{38903}}^1$

素因数の和:38923

約数の個数: 40

約数和(自身を含む): 57889152

約数和(自身を除く): 36103472

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 38903, 77806, 155612, 194515, 272321, 311224, 389030, 544642, 622448, 778060, 1089284, 1361605, 1556120, 2178568, 2723210, 3112240, 4357136, 5446420, 10892840, 21785680]

約数ペア:

[(1, 21785680), (2, 10892840), (4, 5446420), (5, 4357136), (7, 3112240), (8, 2723210), (10, 2178568), (14, 1556120), (16, 1361605), (20, 1089284), (28, 778060), (35, 622448), (40, 544642), (56, 389030), (70, 311224), (80, 272321), (112, 194515), (140, 155612), (280, 77806), (560, 38903)]