21756930

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{55787}}^1$

素因数の和:55810

約数の個数: 32

約数和(自身を含む): 56234304

約数和(自身を除く): 34477374

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390, 55787, 111574, 167361, 278935, 334722, 557870, 725231, 836805, 1450462, 1673610, 2175693, 3626155, 4351386, 7252310, 10878465, 21756930]

約数ペア:

[(1, 21756930), (2, 10878465), (3, 7252310), (5, 4351386), (6, 3626155), (10, 2175693), (13, 1673610), (15, 1450462), (26, 836805), (30, 725231), (39, 557870), (65, 334722), (78, 278935), (130, 167361), (195, 111574), (390, 55787)]