20878900

素因数分解:

$2^2\times 5^2\times 7^2\times {\mathrm{4261}}^1$

素因数の和:4289

約数の個数: 54

約数和(自身を含む): 52716678

約数和(自身を除く): 31837778

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, 4261, 4900, 8522, 17044, 21305, 29827, 42610, 59654, 85220, 106525, 119308, 149135, 208789, 213050, 298270, 417578, 426100, 596540, 745675, 835156, 1043945, 1491350, 2087890, 2982700, 4175780, 5219725, 10439450, 20878900]

約数ペア:

[(1, 20878900), (2, 10439450), (4, 5219725), (5, 4175780), (7, 2982700), (10, 2087890), (14, 1491350), (20, 1043945), (25, 835156), (28, 745675), (35, 596540), (49, 426100), (50, 417578), (70, 298270), (98, 213050), (100, 208789), (140, 149135), (175, 119308), (196, 106525), (245, 85220), (350, 59654), (490, 42610), (700, 29827), (980, 21305), (1225, 17044), (2450, 8522), (4261, 4900)]