21002085

素因数分解:

$3^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{3989}}^1$

素因数の和:4019

約数の個数: 40

約数和(自身を含む): 40554360

約数和(自身を除く): 19552275

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 45, 65, 81, 117, 135, 195, 351, 405, 585, 1053, 1755, 3989, 5265, 11967, 19945, 35901, 51857, 59835, 107703, 155571, 179505, 259285, 323109, 466713, 538515, 777855, 1400139, 1615545, 2333565, 4200417, 7000695, 21002085]

約数ペア:

[(1, 21002085), (3, 7000695), (5, 4200417), (9, 2333565), (13, 1615545), (15, 1400139), (27, 777855), (39, 538515), (45, 466713), (65, 323109), (81, 259285), (117, 179505), (135, 155571), (195, 107703), (351, 59835), (405, 51857), (585, 35901), (1053, 19945), (1755, 11967), (3989, 5265)]