13381225

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{197}}^1$

素因数の和:250

約数の個数: 48

約数和(自身を含む): 20623680

約数和(自身を除く): 7242455

約数列:

[1, 5, 11, 13, 19, 25, 55, 65, 95, 143, 197, 209, 247, 275, 325, 475, 715, 985, 1045, 1235, 2167, 2561, 2717, 3575, 3743, 4925, 5225, 6175, 10835, 12805, 13585, 18715, 28171, 41173, 48659, 54175, 64025, 67925, 93575, 140855, 205865, 243295, 535249, 704275, 1029325, 1216475, 2676245, 13381225]

約数ペア:

[(1, 13381225), (5, 2676245), (11, 1216475), (13, 1029325), (19, 704275), (25, 535249), (55, 243295), (65, 205865), (95, 140855), (143, 93575), (197, 67925), (209, 64025), (247, 54175), (275, 48659), (325, 41173), (475, 28171), (715, 18715), (985, 13585), (1045, 12805), (1235, 10835), (2167, 6175), (2561, 5225), (2717, 4925), (3575, 3743)]