21338168

素因数分解:

$2^3\times {\mathrm{31}}^1\times {\mathrm{139}}^1\times {\mathrm{619}}^1$

素因数の和:795

約数の個数: 32

約数和(自身を含む): 41664000

約数和(自身を除く): 20325832

約数列:

[1, 2, 4, 8, 31, 62, 124, 139, 248, 278, 556, 619, 1112, 1238, 2476, 4309, 4952, 8618, 17236, 19189, 34472, 38378, 76756, 86041, 153512, 172082, 344164, 688328, 2667271, 5334542, 10669084, 21338168]

約数ペア:

[(1, 21338168), (2, 10669084), (4, 5334542), (8, 2667271), (31, 688328), (62, 344164), (124, 172082), (139, 153512), (248, 86041), (278, 76756), (556, 38378), (619, 34472), (1112, 19189), (1238, 17236), (2476, 8618), (4309, 4952)]