20729620

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{109}}^1\times {\mathrm{257}}^1$

素因数の和:412

約数の個数: 48

約数和(自身を含む): 45294480

約数和(自身を除く): 24564860

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 109, 148, 185, 218, 257, 370, 436, 514, 545, 740, 1028, 1090, 1285, 2180, 2570, 4033, 5140, 8066, 9509, 16132, 19018, 20165, 28013, 38036, 40330, 47545, 56026, 80660, 95090, 112052, 140065, 190180, 280130, 560260, 1036481, 2072962, 4145924, 5182405, 10364810, 20729620]

約数ペア:

[(1, 20729620), (2, 10364810), (4, 5182405), (5, 4145924), (10, 2072962), (20, 1036481), (37, 560260), (74, 280130), (109, 190180), (148, 140065), (185, 112052), (218, 95090), (257, 80660), (370, 56026), (436, 47545), (514, 40330), (545, 38036), (740, 28013), (1028, 20165), (1090, 19018), (1285, 16132), (2180, 9509), (2570, 8066), (4033, 5140)]