156978686109

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{393430291}}^1$

素因数の和:393430320

約数の個数: 16

約数和(自身を含む): 251795386880

約数和(自身を除く): 94816700771

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 393430291, 1180290873, 2754012037, 7475175529, 8262036111, 22425526587, 52326228703, 156978686109]

約数ペア:

[(1, 156978686109), (3, 52326228703), (7, 22425526587), (19, 8262036111), (21, 7475175529), (57, 2754012037), (133, 1180290873), (399, 393430291)]