20667580

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{683}}^1$

素因数の和:798

約数の個数: 48

約数和(自身を含む): 46539360

約数和(自身を除く): 25871780

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 89, 170, 178, 340, 356, 445, 683, 890, 1366, 1513, 1780, 2732, 3026, 3415, 6052, 6830, 7565, 11611, 13660, 15130, 23222, 30260, 46444, 58055, 60787, 116110, 121574, 232220, 243148, 303935, 607870, 1033379, 1215740, 2066758, 4133516, 5166895, 10333790, 20667580]

約数ペア:

[(1, 20667580), (2, 10333790), (4, 5166895), (5, 4133516), (10, 2066758), (17, 1215740), (20, 1033379), (34, 607870), (68, 303935), (85, 243148), (89, 232220), (170, 121574), (178, 116110), (340, 60787), (356, 58055), (445, 46444), (683, 30260), (890, 23222), (1366, 15130), (1513, 13660), (1780, 11611), (2732, 7565), (3026, 6830), (3415, 6052)]