20309860

素因数分解:

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

素因数の和:173

約数の個数: 72

約数和(自身を含む): 47045880

約数和(自身を除く): 26736020

約数列:

[1, 2, 4, 5, 10, 19, 20, 29, 38, 58, 76, 95, 97, 116, 145, 190, 194, 290, 361, 380, 388, 485, 551, 580, 722, 970, 1102, 1444, 1805, 1843, 1940, 2204, 2755, 2813, 3610, 3686, 5510, 5626, 7220, 7372, 9215, 10469, 11020, 11252, 14065, 18430, 20938, 28130, 35017, 36860, 41876, 52345, 53447, 56260, 70034, 104690, 106894, 140068, 175085, 209380, 213788, 267235, 350170, 534470, 700340, 1015493, 1068940, 2030986, 4061972, 5077465, 10154930, 20309860]

約数ペア:

[(1, 20309860), (2, 10154930), (4, 5077465), (5, 4061972), (10, 2030986), (19, 1068940), (20, 1015493), (29, 700340), (38, 534470), (58, 350170), (76, 267235), (95, 213788), (97, 209380), (116, 175085), (145, 140068), (190, 106894), (194, 104690), (290, 70034), (361, 56260), (380, 53447), (388, 52345), (485, 41876), (551, 36860), (580, 35017), (722, 28130), (970, 20938), (1102, 18430), (1444, 14065), (1805, 11252), (1843, 11020), (1940, 10469), (2204, 9215), (2755, 7372), (2813, 7220), (3610, 5626), (3686, 5510)]