20640346

素因数分解:

$2^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{359}}^1$

素因数の和:486

約数の個数: 32

約数和(自身を含む): 34992000

約数和(自身を除く): 14351654

約数列:

[1, 2, 17, 19, 34, 38, 89, 178, 323, 359, 646, 718, 1513, 1691, 3026, 3382, 6103, 6821, 12206, 13642, 28747, 31951, 57494, 63902, 115957, 231914, 543167, 607069, 1086334, 1214138, 10320173, 20640346]

約数ペア:

[(1, 20640346), (2, 10320173), (17, 1214138), (19, 1086334), (34, 607069), (38, 543167), (89, 231914), (178, 115957), (323, 63902), (359, 57494), (646, 31951), (718, 28747), (1513, 13642), (1691, 12206), (3026, 6821), (3382, 6103)]