90409900

素因数分解:

$2^2\times 5^2\times 7^2\times {\mathrm{18451}}^1$

素因数の和:18479

約数の個数: 54

約数和(自身を含む): 228232788

約数和(自身を除く): 137822888

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 49, 50, 70, 98, 100, 140, 175, 196, 245, 350, 490, 700, 980, 1225, 2450, 4900, 18451, 36902, 73804, 92255, 129157, 184510, 258314, 369020, 461275, 516628, 645785, 904099, 922550, 1291570, 1808198, 1845100, 2583140, 3228925, 3616396, 4520495, 6457850, 9040990, 12915700, 18081980, 22602475, 45204950, 90409900]

約数ペア:

[(1, 90409900), (2, 45204950), (4, 22602475), (5, 18081980), (7, 12915700), (10, 9040990), (14, 6457850), (20, 4520495), (25, 3616396), (28, 3228925), (35, 2583140), (49, 1845100), (50, 1808198), (70, 1291570), (98, 922550), (100, 904099), (140, 645785), (175, 516628), (196, 461275), (245, 369020), (350, 258314), (490, 184510), (700, 129157), (980, 92255), (1225, 73804), (2450, 36902), (4900, 18451)]