21295664

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{2381}}^1$

素因数の和:2445

約数の個数: 40

約数和(自身を含む): 45486672

約数和(自身を除く): 24191008

約数列:

[1, 2, 4, 8, 13, 16, 26, 43, 52, 86, 104, 172, 208, 344, 559, 688, 1118, 2236, 2381, 4472, 4762, 8944, 9524, 19048, 30953, 38096, 61906, 102383, 123812, 204766, 247624, 409532, 495248, 819064, 1330979, 1638128, 2661958, 5323916, 10647832, 21295664]

約数ペア:

[(1, 21295664), (2, 10647832), (4, 5323916), (8, 2661958), (13, 1638128), (16, 1330979), (26, 819064), (43, 495248), (52, 409532), (86, 247624), (104, 204766), (172, 123812), (208, 102383), (344, 61906), (559, 38096), (688, 30953), (1118, 19048), (2236, 9524), (2381, 8944), (4472, 4762)]