20657390

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{1213}}^1$

素因数の和:1364

約数の個数: 32

約数和(自身を含む): 40382496

約数和(自身を除く): 19725106

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 131, 262, 655, 1213, 1310, 1703, 2426, 3406, 6065, 8515, 12130, 15769, 17030, 31538, 78845, 157690, 158903, 317806, 794515, 1589030, 2065739, 4131478, 10328695, 20657390]

約数ペア:

[(1, 20657390), (2, 10328695), (5, 4131478), (10, 2065739), (13, 1589030), (26, 794515), (65, 317806), (130, 158903), (131, 157690), (262, 78845), (655, 31538), (1213, 17030), (1310, 15769), (1703, 12130), (2426, 8515), (3406, 6065)]