19887318

素因数分解:

$2^1\times 3^2\times {\mathrm{11}}^2\times {\mathrm{23}}^1\times {\mathrm{397}}^1$

素因数の和:450

約数の個数: 72

約数和(自身を含む): 49546224

約数和(自身を除く): 29658906

約数列:

[1, 2, 3, 6, 9, 11, 18, 22, 23, 33, 46, 66, 69, 99, 121, 138, 198, 207, 242, 253, 363, 397, 414, 506, 726, 759, 794, 1089, 1191, 1518, 2178, 2277, 2382, 2783, 3573, 4367, 4554, 5566, 7146, 8349, 8734, 9131, 13101, 16698, 18262, 25047, 26202, 27393, 39303, 48037, 50094, 54786, 78606, 82179, 96074, 100441, 144111, 164358, 200882, 288222, 301323, 432333, 602646, 864666, 903969, 1104851, 1807938, 2209702, 3314553, 6629106, 9943659, 19887318]

約数ペア:

[(1, 19887318), (2, 9943659), (3, 6629106), (6, 3314553), (9, 2209702), (11, 1807938), (18, 1104851), (22, 903969), (23, 864666), (33, 602646), (46, 432333), (66, 301323), (69, 288222), (99, 200882), (121, 164358), (138, 144111), (198, 100441), (207, 96074), (242, 82179), (253, 78606), (363, 54786), (397, 50094), (414, 48037), (506, 39303), (726, 27393), (759, 26202), (794, 25047), (1089, 18262), (1191, 16698), (1518, 13101), (2178, 9131), (2277, 8734), (2382, 8349), (2783, 7146), (3573, 5566), (4367, 4554)]