20963565

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{1091}}^1$

素因数の和:1170

約数の個数: 48

約数和(自身を含む): 42247296

約数和(自身を除く): 21283731

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 61, 63, 105, 183, 305, 315, 427, 549, 915, 1091, 1281, 2135, 2745, 3273, 3843, 5455, 6405, 7637, 9819, 16365, 19215, 22911, 38185, 49095, 66551, 68733, 114555, 199653, 332755, 343665, 465857, 598959, 998265, 1397571, 2329285, 2994795, 4192713, 6987855, 20963565]

約数ペア:

[(1, 20963565), (3, 6987855), (5, 4192713), (7, 2994795), (9, 2329285), (15, 1397571), (21, 998265), (35, 598959), (45, 465857), (61, 343665), (63, 332755), (105, 199653), (183, 114555), (305, 68733), (315, 66551), (427, 49095), (549, 38185), (915, 22911), (1091, 19215), (1281, 16365), (2135, 9819), (2745, 7637), (3273, 6405), (3843, 5455)]