21355568

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{1237}}^1$

素因数の和:1341

約数の個数: 40

約数和(自身を含む): 45132528

約数和(自身を除く): 23776960

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 83, 104, 166, 208, 332, 664, 1079, 1237, 1328, 2158, 2474, 4316, 4948, 8632, 9896, 16081, 17264, 19792, 32162, 64324, 102671, 128648, 205342, 257296, 410684, 821368, 1334723, 1642736, 2669446, 5338892, 10677784, 21355568]

約数ペア:

[(1, 21355568), (2, 10677784), (4, 5338892), (8, 2669446), (13, 1642736), (16, 1334723), (26, 821368), (52, 410684), (83, 257296), (104, 205342), (166, 128648), (208, 102671), (332, 64324), (664, 32162), (1079, 19792), (1237, 17264), (1328, 16081), (2158, 9896), (2474, 8632), (4316, 4948)]