18171980

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{97}}^1$

素因数の和:171

約数の個数: 96

約数和(自身を含む): 44452800

約数和(自身を除く): 26280820

約数列:

[1, 2, 4, 5, 10, 17, 19, 20, 29, 34, 38, 58, 68, 76, 85, 95, 97, 116, 145, 170, 190, 194, 290, 323, 340, 380, 388, 485, 493, 551, 580, 646, 970, 986, 1102, 1292, 1615, 1649, 1843, 1940, 1972, 2204, 2465, 2755, 2813, 3230, 3298, 3686, 4930, 5510, 5626, 6460, 6596, 7372, 8245, 9215, 9367, 9860, 11020, 11252, 14065, 16490, 18430, 18734, 28130, 31331, 32980, 36860, 37468, 46835, 47821, 53447, 56260, 62662, 93670, 95642, 106894, 125324, 156655, 187340, 191284, 213788, 239105, 267235, 313310, 478210, 534470, 626620, 908599, 956420, 1068940, 1817198, 3634396, 4542995, 9085990, 18171980]

約数ペア:

[(1, 18171980), (2, 9085990), (4, 4542995), (5, 3634396), (10, 1817198), (17, 1068940), (19, 956420), (20, 908599), (29, 626620), (34, 534470), (38, 478210), (58, 313310), (68, 267235), (76, 239105), (85, 213788), (95, 191284), (97, 187340), (116, 156655), (145, 125324), (170, 106894), (190, 95642), (194, 93670), (290, 62662), (323, 56260), (340, 53447), (380, 47821), (388, 46835), (485, 37468), (493, 36860), (551, 32980), (580, 31331), (646, 28130), (970, 18734), (986, 18430), (1102, 16490), (1292, 14065), (1615, 11252), (1649, 11020), (1843, 9860), (1940, 9367), (1972, 9215), (2204, 8245), (2465, 7372), (2755, 6596), (2813, 6460), (3230, 5626), (3298, 5510), (3686, 4930)]