18783895

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{191}}^1$

素因数の和:315

約数の個数: 32

約数和(自身を含む): 26127360

約数和(自身を除く): 7343465

約数列:

[1, 5, 13, 17, 65, 85, 89, 191, 221, 445, 955, 1105, 1157, 1513, 2483, 3247, 5785, 7565, 12415, 16235, 16999, 19669, 42211, 84995, 98345, 211055, 220987, 288983, 1104935, 1444915, 3756779, 18783895]

約数ペア:

[(1, 18783895), (5, 3756779), (13, 1444915), (17, 1104935), (65, 288983), (85, 220987), (89, 211055), (191, 98345), (221, 84995), (445, 42211), (955, 19669), (1105, 16999), (1157, 16235), (1513, 12415), (2483, 7565), (3247, 5785)]