20820228

素因数分解:

$2^2\times 3^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{1103}}^1$

素因数の和:1145

約数の個数: 72

約数和(自身を含む): 57558144

約数和(自身を除く): 36737916

約数列:

[1, 2, 3, 4, 6, 11, 12, 13, 22, 26, 33, 39, 44, 52, 66, 78, 121, 132, 143, 156, 242, 286, 363, 429, 484, 572, 726, 858, 1103, 1452, 1573, 1716, 2206, 3146, 3309, 4412, 4719, 6292, 6618, 9438, 12133, 13236, 14339, 18876, 24266, 28678, 36399, 43017, 48532, 57356, 72798, 86034, 133463, 145596, 157729, 172068, 266926, 315458, 400389, 473187, 533852, 630916, 800778, 946374, 1601556, 1735019, 1892748, 3470038, 5205057, 6940076, 10410114, 20820228]

約数ペア:

[(1, 20820228), (2, 10410114), (3, 6940076), (4, 5205057), (6, 3470038), (11, 1892748), (12, 1735019), (13, 1601556), (22, 946374), (26, 800778), (33, 630916), (39, 533852), (44, 473187), (52, 400389), (66, 315458), (78, 266926), (121, 172068), (132, 157729), (143, 145596), (156, 133463), (242, 86034), (286, 72798), (363, 57356), (429, 48532), (484, 43017), (572, 36399), (726, 28678), (858, 24266), (1103, 18876), (1452, 14339), (1573, 13236), (1716, 12133), (2206, 9438), (3146, 6618), (3309, 6292), (4412, 4719)]