20617880

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{13931}}^1$

素因数の和:13979

約数の個数: 32

約数和(自身を含む): 47647440

約数和(自身を除く): 27029560

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 148, 185, 296, 370, 740, 1480, 13931, 27862, 55724, 69655, 111448, 139310, 278620, 515447, 557240, 1030894, 2061788, 2577235, 4123576, 5154470, 10308940, 20617880]

約数ペア:

[(1, 20617880), (2, 10308940), (4, 5154470), (5, 4123576), (8, 2577235), (10, 2061788), (20, 1030894), (37, 557240), (40, 515447), (74, 278620), (148, 139310), (185, 111448), (296, 69655), (370, 55724), (740, 27862), (1480, 13931)]