21000512

素因数分解:

$2^6\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{587}}^1$

素因数の和:655

約数の個数: 56

約数和(自身を含む): 46000416

約数和(自身を除く): 24999904

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 43, 52, 64, 86, 104, 172, 208, 344, 416, 559, 587, 688, 832, 1118, 1174, 1376, 2236, 2348, 2752, 4472, 4696, 7631, 8944, 9392, 15262, 17888, 18784, 25241, 30524, 35776, 37568, 50482, 61048, 100964, 122096, 201928, 244192, 328133, 403856, 488384, 656266, 807712, 1312532, 1615424, 2625064, 5250128, 10500256, 21000512]

約数ペア:

[(1, 21000512), (2, 10500256), (4, 5250128), (8, 2625064), (13, 1615424), (16, 1312532), (26, 807712), (32, 656266), (43, 488384), (52, 403856), (64, 328133), (86, 244192), (104, 201928), (172, 122096), (208, 100964), (344, 61048), (416, 50482), (559, 37568), (587, 35776), (688, 30524), (832, 25241), (1118, 18784), (1174, 17888), (1376, 15262), (2236, 9392), (2348, 8944), (2752, 7631), (4472, 4696)]