19981377

素因数分解:

$3^3\times {\mathrm{13}}^2\times {\mathrm{29}}^1\times {\mathrm{151}}^1$

素因数の和:215

約数の個数: 48

約数和(自身を含む): 33379200

約数和(自身を除く): 13397823

約数列:

[1, 3, 9, 13, 27, 29, 39, 87, 117, 151, 169, 261, 351, 377, 453, 507, 783, 1131, 1359, 1521, 1963, 3393, 4077, 4379, 4563, 4901, 5889, 10179, 13137, 14703, 17667, 25519, 39411, 44109, 53001, 56927, 76557, 118233, 132327, 170781, 229671, 512343, 689013, 740051, 1537029, 2220153, 6660459, 19981377]

約数ペア:

[(1, 19981377), (3, 6660459), (9, 2220153), (13, 1537029), (27, 740051), (29, 689013), (39, 512343), (87, 229671), (117, 170781), (151, 132327), (169, 118233), (261, 76557), (351, 56927), (377, 53001), (453, 44109), (507, 39411), (783, 25519), (1131, 17667), (1359, 14703), (1521, 13137), (1963, 10179), (3393, 5889), (4077, 4901), (4379, 4563)]