21219275

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{151}}^1$

素因数の和:252

約数の個数: 48

約数和(自身を含む): 33474048

約数和(自身を除く): 12254773

約数列:

[1, 5, 7, 11, 25, 35, 55, 73, 77, 151, 175, 275, 365, 385, 511, 755, 803, 1057, 1661, 1825, 1925, 2555, 3775, 4015, 5285, 5621, 8305, 11023, 11627, 12775, 20075, 26425, 28105, 41525, 55115, 58135, 77161, 121253, 140525, 275575, 290675, 385805, 606265, 848771, 1929025, 3031325, 4243855, 21219275]

約数ペア:

[(1, 21219275), (5, 4243855), (7, 3031325), (11, 1929025), (25, 848771), (35, 606265), (55, 385805), (73, 290675), (77, 275575), (151, 140525), (175, 121253), (275, 77161), (365, 58135), (385, 55115), (511, 41525), (755, 28105), (803, 26425), (1057, 20075), (1661, 12775), (1825, 11627), (1925, 11023), (2555, 8305), (3775, 5621), (4015, 5285)]