21761720

素因数分解:

$2^3\times 5^1\times {\mathrm{131}}^1\times {\mathrm{4153}}^1$

素因数の和:4295

約数の個数: 32

約数和(自身を含む): 49349520

約数和(自身を除く): 27587800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 131, 262, 524, 655, 1048, 1310, 2620, 4153, 5240, 8306, 16612, 20765, 33224, 41530, 83060, 166120, 544043, 1088086, 2176172, 2720215, 4352344, 5440430, 10880860, 21761720]

約数ペア:

[(1, 21761720), (2, 10880860), (4, 5440430), (5, 4352344), (8, 2720215), (10, 2176172), (20, 1088086), (40, 544043), (131, 166120), (262, 83060), (524, 41530), (655, 33224), (1048, 20765), (1310, 16612), (2620, 8306), (4153, 5240)]