21368900

素因数分解:

$2^2\times 5^2\times 7^4\times {\mathrm{89}}^1$

素因数の和:131

約数の個数: 90

約数和(自身を含む): 54703530

約数和(自身を除く): 33334630

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 49, 50, 70, 89, 98, 100, 140, 175, 178, 196, 245, 343, 350, 356, 445, 490, 623, 686, 700, 890, 980, 1225, 1246, 1372, 1715, 1780, 2225, 2401, 2450, 2492, 3115, 3430, 4361, 4450, 4802, 4900, 6230, 6860, 8575, 8722, 8900, 9604, 12005, 12460, 15575, 17150, 17444, 21805, 24010, 30527, 31150, 34300, 43610, 48020, 60025, 61054, 62300, 87220, 109025, 120050, 122108, 152635, 213689, 218050, 240100, 305270, 427378, 436100, 610540, 763175, 854756, 1068445, 1526350, 2136890, 3052700, 4273780, 5342225, 10684450, 21368900]

約数ペア:

[(1, 21368900), (2, 10684450), (4, 5342225), (5, 4273780), (7, 3052700), (10, 2136890), (14, 1526350), (20, 1068445), (25, 854756), (28, 763175), (35, 610540), (49, 436100), (50, 427378), (70, 305270), (89, 240100), (98, 218050), (100, 213689), (140, 152635), (175, 122108), (178, 120050), (196, 109025), (245, 87220), (343, 62300), (350, 61054), (356, 60025), (445, 48020), (490, 43610), (623, 34300), (686, 31150), (700, 30527), (890, 24010), (980, 21805), (1225, 17444), (1246, 17150), (1372, 15575), (1715, 12460), (1780, 12005), (2225, 9604), (2401, 8900), (2450, 8722), (2492, 8575), (3115, 6860), (3430, 6230), (4361, 4900), (4450, 4802)]