19980688

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{13723}}^1$

素因数の和:13751

約数の個数: 40

約数和(自身を含む): 47649728

約数和(自身を除く): 27669040

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 52, 56, 91, 104, 112, 182, 208, 364, 728, 1456, 13723, 27446, 54892, 96061, 109784, 178399, 192122, 219568, 356798, 384244, 713596, 768488, 1248793, 1427192, 1536976, 2497586, 2854384, 4995172, 9990344, 19980688]

約数ペア:

[(1, 19980688), (2, 9990344), (4, 4995172), (7, 2854384), (8, 2497586), (13, 1536976), (14, 1427192), (16, 1248793), (26, 768488), (28, 713596), (52, 384244), (56, 356798), (91, 219568), (104, 192122), (112, 178399), (182, 109784), (208, 96061), (364, 54892), (728, 27446), (1456, 13723)]