19870705

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{157}}^1\times {\mathrm{1489}}^1$

素因数の和:1668

約数の個数: 16

約数和(自身を含む): 25425360

約数和(自身を除く): 5554655

約数列:

[1, 5, 17, 85, 157, 785, 1489, 2669, 7445, 13345, 25313, 126565, 233773, 1168865, 3974141, 19870705]

約数ペア:

[(1, 19870705), (5, 3974141), (17, 1168865), (85, 233773), (157, 126565), (785, 25313), (1489, 13345), (2669, 7445)]