20671378

素因数分解:

$2^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{2143}}^1$

素因数の和:2218

約数の個数: 32

約数和(自身を含む): 38900736

約数和(自身を除く): 18229358

約数列:

[1, 2, 7, 13, 14, 26, 53, 91, 106, 182, 371, 689, 742, 1378, 2143, 4286, 4823, 9646, 15001, 27859, 30002, 55718, 113579, 195013, 227158, 390026, 795053, 1476527, 1590106, 2953054, 10335689, 20671378]

約数ペア:

[(1, 20671378), (2, 10335689), (7, 2953054), (13, 1590106), (14, 1476527), (26, 795053), (53, 390026), (91, 227158), (106, 195013), (182, 113579), (371, 55718), (689, 30002), (742, 27859), (1378, 15001), (2143, 9646), (4286, 4823)]