12890420

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{1223}}^1$

素因数の和:1280

約数の個数: 48

約数和(自身を含む): 29611008

約数和(自身を除く): 16720588

約数列:

[1, 2, 4, 5, 10, 17, 20, 31, 34, 62, 68, 85, 124, 155, 170, 310, 340, 527, 620, 1054, 1223, 2108, 2446, 2635, 4892, 5270, 6115, 10540, 12230, 20791, 24460, 37913, 41582, 75826, 83164, 103955, 151652, 189565, 207910, 379130, 415820, 644521, 758260, 1289042, 2578084, 3222605, 6445210, 12890420]

約数ペア:

[(1, 12890420), (2, 6445210), (4, 3222605), (5, 2578084), (10, 1289042), (17, 758260), (20, 644521), (31, 415820), (34, 379130), (62, 207910), (68, 189565), (85, 151652), (124, 103955), (155, 83164), (170, 75826), (310, 41582), (340, 37913), (527, 24460), (620, 20791), (1054, 12230), (1223, 10540), (2108, 6115), (2446, 5270), (2635, 4892)]