19999518

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{593}}^1$

素因数の和:689

約数の個数: 64

約数和(自身を含む): 50637312

約数和(自身を除く): 30637794

約数列:

[1, 2, 3, 6, 7, 11, 14, 21, 22, 33, 42, 66, 73, 77, 146, 154, 219, 231, 438, 462, 511, 593, 803, 1022, 1186, 1533, 1606, 1779, 2409, 3066, 3558, 4151, 4818, 5621, 6523, 8302, 11242, 12453, 13046, 16863, 19569, 24906, 33726, 39138, 43289, 45661, 86578, 91322, 129867, 136983, 259734, 273966, 303023, 476179, 606046, 909069, 952358, 1428537, 1818138, 2857074, 3333253, 6666506, 9999759, 19999518]

約数ペア:

[(1, 19999518), (2, 9999759), (3, 6666506), (6, 3333253), (7, 2857074), (11, 1818138), (14, 1428537), (21, 952358), (22, 909069), (33, 606046), (42, 476179), (66, 303023), (73, 273966), (77, 259734), (146, 136983), (154, 129867), (219, 91322), (231, 86578), (438, 45661), (462, 43289), (511, 39138), (593, 33726), (803, 24906), (1022, 19569), (1186, 16863), (1533, 13046), (1606, 12453), (1779, 11242), (2409, 8302), (3066, 6523), (3558, 5621), (4151, 4818)]