21661388

素因数分解:

$2^2\times 7^1\times {\mathrm{787}}^1\times {\mathrm{983}}^1$

素因数の和:1781

約数の個数: 24

約数和(自身を含む): 43421952

約数和(自身を除く): 21760564

約数列:

[1, 2, 4, 7, 14, 28, 787, 983, 1574, 1966, 3148, 3932, 5509, 6881, 11018, 13762, 22036, 27524, 773621, 1547242, 3094484, 5415347, 10830694, 21661388]

約数ペア:

[(1, 21661388), (2, 10830694), (4, 5415347), (7, 3094484), (14, 1547242), (28, 773621), (787, 27524), (983, 22036), (1574, 13762), (1966, 11018), (3148, 6881), (3932, 5509)]