20687420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{251}}^1\times {\mathrm{317}}^1$

素因数の和:590

約数の個数: 48

約数和(自身を含む): 47119968

約数和(自身を除く): 26432548

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 251, 260, 317, 502, 634, 1004, 1255, 1268, 1585, 2510, 3170, 3263, 4121, 5020, 6340, 6526, 8242, 13052, 16315, 16484, 20605, 32630, 41210, 65260, 79567, 82420, 159134, 318268, 397835, 795670, 1034371, 1591340, 2068742, 4137484, 5171855, 10343710, 20687420]

約数ペア:

[(1, 20687420), (2, 10343710), (4, 5171855), (5, 4137484), (10, 2068742), (13, 1591340), (20, 1034371), (26, 795670), (52, 397835), (65, 318268), (130, 159134), (251, 82420), (260, 79567), (317, 65260), (502, 41210), (634, 32630), (1004, 20605), (1255, 16484), (1268, 16315), (1585, 13052), (2510, 8242), (3170, 6526), (3263, 6340), (4121, 5020)]