12903220

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{659}}^1$

素因数の和:768

約数の個数: 48

約数和(自身を含む): 29937600

約数和(自身を除く): 17034380

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 89, 110, 178, 220, 356, 445, 659, 890, 979, 1318, 1780, 1958, 2636, 3295, 3916, 4895, 6590, 7249, 9790, 13180, 14498, 19580, 28996, 36245, 58651, 72490, 117302, 144980, 234604, 293255, 586510, 645161, 1173020, 1290322, 2580644, 3225805, 6451610, 12903220]

約数ペア:

[(1, 12903220), (2, 6451610), (4, 3225805), (5, 2580644), (10, 1290322), (11, 1173020), (20, 645161), (22, 586510), (44, 293255), (55, 234604), (89, 144980), (110, 117302), (178, 72490), (220, 58651), (356, 36245), (445, 28996), (659, 19580), (890, 14498), (979, 13180), (1318, 9790), (1780, 7249), (1958, 6590), (2636, 4895), (3295, 3916)]