19978167

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{331}}^1$

素因数の和:435

約数の個数: 32

約数和(自身を含む): 30597120

約数和(自身を除く): 10618953

約数列:

[1, 3, 11, 31, 33, 59, 93, 177, 331, 341, 649, 993, 1023, 1829, 1947, 3641, 5487, 10261, 10923, 19529, 20119, 30783, 58587, 60357, 112871, 214819, 338613, 605399, 644457, 1816197, 6659389, 19978167]

約数ペア:

[(1, 19978167), (3, 6659389), (11, 1816197), (31, 644457), (33, 605399), (59, 338613), (93, 214819), (177, 112871), (331, 60357), (341, 58587), (649, 30783), (993, 20119), (1023, 19529), (1829, 10923), (1947, 10261), (3641, 5487)]