21491241625

素因数分解:

$5^3\times 7^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1\times {\mathrm{89}}^1\times {\mathrm{127}}^1$

素因数の和:332

約数の個数: 128

約数和(自身を含む): 32606945280

約数和(自身を除く): 11115703655

約数列:

[1, 5, 7, 25, 35, 41, 53, 89, 125, 127, 175, 205, 265, 287, 371, 445, 623, 635, 875, 889, 1025, 1325, 1435, 1855, 2173, 2225, 3115, 3175, 3649, 4445, 4717, 5125, 5207, 6625, 6731, 7175, 9275, 10865, 11125, 11303, 15211, 15575, 15875, 18245, 22225, 23585, 25543, 26035, 33019, 33655, 35875, 36449, 46375, 47117, 54325, 56515, 76055, 77875, 79121, 91225, 111125, 117925, 127715, 130175, 165095, 168275, 182245, 193397, 235585, 271625, 275971, 282575, 380275, 395605, 456125, 463423, 589625, 599059, 638575, 650875, 825475, 841375, 911225, 966985, 1177925, 1353779, 1379855, 1412875, 1901375, 1931797, 1978025, 2317115, 2995295, 3192875, 3243961, 4127375, 4193413, 4556125, 4834925, 5889625, 6768895, 6899275, 9658985, 9890125, 11585575, 14976475, 16219805, 20967065, 24174625, 24561419, 33844475, 34496375, 48294925, 57927875, 74882375, 81099025, 104835325, 122807095, 169222375, 171929933, 241474625, 405495125, 524176625, 614035475, 859649665, 3070177375, 4298248325, 21491241625]

約数ペア:

[(1, 21491241625), (5, 4298248325), (7, 3070177375), (25, 859649665), (35, 614035475), (41, 524176625), (53, 405495125), (89, 241474625), (125, 171929933), (127, 169222375), (175, 122807095), (205, 104835325), (265, 81099025), (287, 74882375), (371, 57927875), (445, 48294925), (623, 34496375), (635, 33844475), (875, 24561419), (889, 24174625), (1025, 20967065), (1325, 16219805), (1435, 14976475), (1855, 11585575), (2173, 9890125), (2225, 9658985), (3115, 6899275), (3175, 6768895), (3649, 5889625), (4445, 4834925), (4717, 4556125), (5125, 4193413), (5207, 4127375), (6625, 3243961), (6731, 3192875), (7175, 2995295), (9275, 2317115), (10865, 1978025), (11125, 1931797), (11303, 1901375), (15211, 1412875), (15575, 1379855), (15875, 1353779), (18245, 1177925), (22225, 966985), (23585, 911225), (25543, 841375), (26035, 825475), (33019, 650875), (33655, 638575), (35875, 599059), (36449, 589625), (46375, 463423), (47117, 456125), (54325, 395605), (56515, 380275), (76055, 282575), (77875, 275971), (79121, 271625), (91225, 235585), (111125, 193397), (117925, 182245), (127715, 168275), (130175, 165095)]