21316784

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{70121}}^1$

素因数の和:70148

約数の個数: 20

約数和(自身を含む): 43475640

約数和(自身を除く): 22158856

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 70121, 140242, 280484, 560968, 1121936, 1332299, 2664598, 5329196, 10658392, 21316784]

約数ペア:

[(1, 21316784), (2, 10658392), (4, 5329196), (8, 2664598), (16, 1332299), (19, 1121936), (38, 560968), (76, 280484), (152, 140242), (304, 70121)]