20663925

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{853}}^1$

素因数の和:902

約数の個数: 48

約数和(自身を含む): 38122560

約数和(自身を除く): 17458635

約数列:

[1, 3, 5, 15, 17, 19, 25, 51, 57, 75, 85, 95, 255, 285, 323, 425, 475, 853, 969, 1275, 1425, 1615, 2559, 4265, 4845, 8075, 12795, 14501, 16207, 21325, 24225, 43503, 48621, 63975, 72505, 81035, 217515, 243105, 275519, 362525, 405175, 826557, 1087575, 1215525, 1377595, 4132785, 6887975, 20663925]

約数ペア:

[(1, 20663925), (3, 6887975), (5, 4132785), (15, 1377595), (17, 1215525), (19, 1087575), (25, 826557), (51, 405175), (57, 362525), (75, 275519), (85, 243105), (95, 217515), (255, 81035), (285, 72505), (323, 63975), (425, 48621), (475, 43503), (853, 24225), (969, 21325), (1275, 16207), (1425, 14501), (1615, 12795), (2559, 8075), (4265, 4845)]