21458775

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^2\times {\mathrm{1693}}^1$

素因数の和:1732

約数の個数: 36

約数和(自身を含む): 38440248

約数和(自身を除く): 16981473

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 169, 195, 325, 507, 845, 975, 1693, 2535, 4225, 5079, 8465, 12675, 22009, 25395, 42325, 66027, 110045, 126975, 286117, 330135, 550225, 858351, 1430585, 1650675, 4291755, 7152925, 21458775]

約数ペア:

[(1, 21458775), (3, 7152925), (5, 4291755), (13, 1650675), (15, 1430585), (25, 858351), (39, 550225), (65, 330135), (75, 286117), (169, 126975), (195, 110045), (325, 66027), (507, 42325), (845, 25395), (975, 22009), (1693, 12675), (2535, 8465), (4225, 5079)]