21979568

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{251}}^1\times {\mathrm{421}}^1$

素因数の和:693

約数の個数: 40

約数和(自身を含む): 46153296

約数和(自身を除く): 24173728

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 251, 421, 502, 842, 1004, 1684, 2008, 3263, 3368, 4016, 5473, 6526, 6736, 10946, 13052, 21892, 26104, 43784, 52208, 87568, 105671, 211342, 422684, 845368, 1373723, 1690736, 2747446, 5494892, 10989784, 21979568]

約数ペア:

[(1, 21979568), (2, 10989784), (4, 5494892), (8, 2747446), (13, 1690736), (16, 1373723), (26, 845368), (52, 422684), (104, 211342), (208, 105671), (251, 87568), (421, 52208), (502, 43784), (842, 26104), (1004, 21892), (1684, 13052), (2008, 10946), (3263, 6736), (3368, 6526), (4016, 5473)]