21248045

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{67}}^1$

素因数の和:150

約数の個数: 64

約数和(自身を含む): 34546176

約数和(自身を除く): 13298131

約数列:

[1, 5, 7, 13, 17, 35, 41, 65, 67, 85, 91, 119, 205, 221, 287, 335, 455, 469, 533, 595, 697, 871, 1105, 1139, 1435, 1547, 2345, 2665, 2747, 3485, 3731, 4355, 4879, 5695, 6097, 7735, 7973, 9061, 13735, 14807, 18655, 19229, 24395, 30485, 35711, 39865, 45305, 46699, 63427, 74035, 96145, 103649, 178555, 233495, 249977, 317135, 326893, 518245, 607087, 1249885, 1634465, 3035435, 4249609, 21248045]

約数ペア:

[(1, 21248045), (5, 4249609), (7, 3035435), (13, 1634465), (17, 1249885), (35, 607087), (41, 518245), (65, 326893), (67, 317135), (85, 249977), (91, 233495), (119, 178555), (205, 103649), (221, 96145), (287, 74035), (335, 63427), (455, 46699), (469, 45305), (533, 39865), (595, 35711), (697, 30485), (871, 24395), (1105, 19229), (1139, 18655), (1435, 14807), (1547, 13735), (2345, 9061), (2665, 7973), (2747, 7735), (3485, 6097), (3731, 5695), (4355, 4879)]