20021365

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{557}}^1$

素因数の和:661

約数の個数: 32

約数和(自身を含む): 29998080

約数和(自身を除く): 9976715

約数列:

[1, 5, 7, 13, 35, 65, 79, 91, 395, 455, 553, 557, 1027, 2765, 2785, 3899, 5135, 7189, 7241, 19495, 35945, 36205, 44003, 50687, 220015, 253435, 308021, 572039, 1540105, 2860195, 4004273, 20021365]

約数ペア:

[(1, 20021365), (5, 4004273), (7, 2860195), (13, 1540105), (35, 572039), (65, 308021), (79, 253435), (91, 220015), (395, 50687), (455, 44003), (553, 36205), (557, 35945), (1027, 19495), (2765, 7241), (2785, 7189), (3899, 5135)]