21826805

素因数分解:

$5^1\times 7^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1$

素因数の和:139

約数の個数: 64

約数和(自身を含む): 36288000

約数和(自身を除く): 14461195

約数列:

[1, 5, 7, 11, 13, 35, 49, 55, 65, 77, 89, 91, 143, 245, 343, 385, 445, 455, 539, 623, 637, 715, 979, 1001, 1157, 1715, 2695, 3115, 3185, 3773, 4361, 4459, 4895, 5005, 5785, 6853, 7007, 8099, 12727, 18865, 21805, 22295, 30527, 34265, 35035, 40495, 47971, 49049, 56693, 63635, 89089, 152635, 239855, 245245, 283465, 335797, 396851, 445445, 623623, 1678985, 1984255, 3118115, 4365361, 21826805]

約数ペア:

[(1, 21826805), (5, 4365361), (7, 3118115), (11, 1984255), (13, 1678985), (35, 623623), (49, 445445), (55, 396851), (65, 335797), (77, 283465), (89, 245245), (91, 239855), (143, 152635), (245, 89089), (343, 63635), (385, 56693), (445, 49049), (455, 47971), (539, 40495), (623, 35035), (637, 34265), (715, 30527), (979, 22295), (1001, 21805), (1157, 18865), (1715, 12727), (2695, 8099), (3115, 7007), (3185, 6853), (3773, 5785), (4361, 5005), (4459, 4895)]