20341840

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{2857}}^1$

素因数の和:2959

約数の個数: 40

約数和(自身を含む): 47842920

約数和(自身を除く): 27501080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 356, 445, 712, 890, 1424, 1780, 2857, 3560, 5714, 7120, 11428, 14285, 22856, 28570, 45712, 57140, 114280, 228560, 254273, 508546, 1017092, 1271365, 2034184, 2542730, 4068368, 5085460, 10170920, 20341840]

約数ペア:

[(1, 20341840), (2, 10170920), (4, 5085460), (5, 4068368), (8, 2542730), (10, 2034184), (16, 1271365), (20, 1017092), (40, 508546), (80, 254273), (89, 228560), (178, 114280), (356, 57140), (445, 45712), (712, 28570), (890, 22856), (1424, 14285), (1780, 11428), (2857, 7120), (3560, 5714)]