21721791

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{251}}^1\times {\mathrm{317}}^1$

素因数の和:591

約数の個数: 32

約数和(自身を含む): 35900928

約数和(自身を除く): 14179137

約数列:

[1, 3, 7, 13, 21, 39, 91, 251, 273, 317, 753, 951, 1757, 2219, 3263, 4121, 5271, 6657, 9789, 12363, 22841, 28847, 68523, 79567, 86541, 238701, 556969, 1034371, 1670907, 3103113, 7240597, 21721791]

約数ペア:

[(1, 21721791), (3, 7240597), (7, 3103113), (13, 1670907), (21, 1034371), (39, 556969), (91, 238701), (251, 86541), (273, 79567), (317, 68523), (753, 28847), (951, 22841), (1757, 12363), (2219, 9789), (3263, 6657), (4121, 5271)]