20911156

素因数分解:

$2^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{197}}^1\times {\mathrm{223}}^1$

素因数の和:448

約数の個数: 48

約数和(自身を含む): 44706816

約数和(自身を除く): 23795660

約数列:

[1, 2, 4, 7, 14, 17, 28, 34, 68, 119, 197, 223, 238, 394, 446, 476, 788, 892, 1379, 1561, 2758, 3122, 3349, 3791, 5516, 6244, 6698, 7582, 13396, 15164, 23443, 26537, 43931, 46886, 53074, 87862, 93772, 106148, 175724, 307517, 615034, 746827, 1230068, 1493654, 2987308, 5227789, 10455578, 20911156]

約数ペア:

[(1, 20911156), (2, 10455578), (4, 5227789), (7, 2987308), (14, 1493654), (17, 1230068), (28, 746827), (34, 615034), (68, 307517), (119, 175724), (197, 106148), (223, 93772), (238, 87862), (394, 53074), (446, 46886), (476, 43931), (788, 26537), (892, 23443), (1379, 15164), (1561, 13396), (2758, 7582), (3122, 6698), (3349, 6244), (3791, 5516)]