21173915

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{907}}^1$

素因数の和:971

約数の個数: 32

約数和(自身を含む): 31380480

約数和(自身を除く): 10206565

約数列:

[1, 5, 7, 23, 29, 35, 115, 145, 161, 203, 667, 805, 907, 1015, 3335, 4535, 4669, 6349, 20861, 23345, 26303, 31745, 104305, 131515, 146027, 184121, 604969, 730135, 920605, 3024845, 4234783, 21173915]

約数ペア:

[(1, 21173915), (5, 4234783), (7, 3024845), (23, 920605), (29, 730135), (35, 604969), (115, 184121), (145, 146027), (161, 131515), (203, 104305), (667, 31745), (805, 26303), (907, 23345), (1015, 20861), (3335, 6349), (4535, 4669)]