20828731

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{619}}^1$

素因数の和:679

約数の個数: 32

約数和(自身を含む): 28569600

約数和(自身を除く): 7740869

約数列:

[1, 7, 11, 19, 23, 77, 133, 161, 209, 253, 437, 619, 1463, 1771, 3059, 4333, 4807, 6809, 11761, 14237, 33649, 47663, 82327, 99659, 129371, 156607, 270503, 905597, 1096249, 1893521, 2975533, 20828731]

約数ペア:

[(1, 20828731), (7, 2975533), (11, 1893521), (19, 1096249), (23, 905597), (77, 270503), (133, 156607), (161, 129371), (209, 99659), (253, 82327), (437, 47663), (619, 33649), (1463, 14237), (1771, 11761), (3059, 6809), (4333, 4807)]