19691980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{673}}^1$

素因数の和:719

約数の個数: 96

約数和(自身を含む): 54351360

約数和(自身を除く): 34659380

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 19, 20, 22, 28, 35, 38, 44, 55, 70, 76, 77, 95, 110, 133, 140, 154, 190, 209, 220, 266, 308, 380, 385, 418, 532, 665, 673, 770, 836, 1045, 1330, 1346, 1463, 1540, 2090, 2660, 2692, 2926, 3365, 4180, 4711, 5852, 6730, 7315, 7403, 9422, 12787, 13460, 14630, 14806, 18844, 23555, 25574, 29260, 29612, 37015, 47110, 51148, 51821, 63935, 74030, 89509, 94220, 103642, 127870, 140657, 148060, 179018, 207284, 255740, 259105, 281314, 358036, 447545, 518210, 562628, 703285, 895090, 984599, 1036420, 1406570, 1790180, 1969198, 2813140, 3938396, 4922995, 9845990, 19691980]

約数ペア:

[(1, 19691980), (2, 9845990), (4, 4922995), (5, 3938396), (7, 2813140), (10, 1969198), (11, 1790180), (14, 1406570), (19, 1036420), (20, 984599), (22, 895090), (28, 703285), (35, 562628), (38, 518210), (44, 447545), (55, 358036), (70, 281314), (76, 259105), (77, 255740), (95, 207284), (110, 179018), (133, 148060), (140, 140657), (154, 127870), (190, 103642), (209, 94220), (220, 89509), (266, 74030), (308, 63935), (380, 51821), (385, 51148), (418, 47110), (532, 37015), (665, 29612), (673, 29260), (770, 25574), (836, 23555), (1045, 18844), (1330, 14806), (1346, 14630), (1463, 13460), (1540, 12787), (2090, 9422), (2660, 7403), (2692, 7315), (2926, 6730), (3365, 5852), (4180, 4711)]