19811324

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{307}}^1$

素因数の和:414

約数の個数: 48

約数和(自身を含む): 40205088

約数和(自身を除く): 20393764

約数列:

[1, 2, 4, 13, 17, 26, 34, 52, 68, 73, 146, 221, 292, 307, 442, 614, 884, 949, 1228, 1241, 1898, 2482, 3796, 3991, 4964, 5219, 7982, 10438, 15964, 16133, 20876, 22411, 32266, 44822, 64532, 67847, 89644, 135694, 271388, 291343, 380987, 582686, 761974, 1165372, 1523948, 4952831, 9905662, 19811324]

約数ペア:

[(1, 19811324), (2, 9905662), (4, 4952831), (13, 1523948), (17, 1165372), (26, 761974), (34, 582686), (52, 380987), (68, 291343), (73, 271388), (146, 135694), (221, 89644), (292, 67847), (307, 64532), (442, 44822), (614, 32266), (884, 22411), (949, 20876), (1228, 16133), (1241, 15964), (1898, 10438), (2482, 7982), (3796, 5219), (3991, 4964)]