2564980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{131}}^1$

素因数の和:240

約数の個数: 48

約数和(自身を含む): 5987520

約数和(自身を除く): 3422540

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 89, 110, 131, 178, 220, 262, 356, 445, 524, 655, 890, 979, 1310, 1441, 1780, 1958, 2620, 2882, 3916, 4895, 5764, 7205, 9790, 11659, 14410, 19580, 23318, 28820, 46636, 58295, 116590, 128249, 233180, 256498, 512996, 641245, 1282490, 2564980]

約数ペア:

[(1, 2564980), (2, 1282490), (4, 641245), (5, 512996), (10, 256498), (11, 233180), (20, 128249), (22, 116590), (44, 58295), (55, 46636), (89, 28820), (110, 23318), (131, 19580), (178, 14410), (220, 11659), (262, 9790), (356, 7205), (445, 5764), (524, 4895), (655, 3916), (890, 2882), (979, 2620), (1310, 1958), (1441, 1780)]