21000251980

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{112097}}^1$

素因数の和:112171

約数の個数: 96

約数和(自身を含む): 50847652800

約数和(自身を除く): 29847400820

約数列:

[1, 2, 4, 5, 10, 17, 19, 20, 29, 34, 38, 58, 68, 76, 85, 95, 116, 145, 170, 190, 290, 323, 340, 380, 493, 551, 580, 646, 986, 1102, 1292, 1615, 1972, 2204, 2465, 2755, 3230, 4930, 5510, 6460, 9367, 9860, 11020, 18734, 37468, 46835, 93670, 112097, 187340, 224194, 448388, 560485, 1120970, 1905649, 2129843, 2241940, 3250813, 3811298, 4259686, 6501626, 7622596, 8519372, 9528245, 10649215, 13003252, 16254065, 19056490, 21298430, 32508130, 36207331, 38112980, 42596860, 55263821, 61765447, 65016260, 72414662, 110527642, 123530894, 144829324, 181036655, 221055284, 247061788, 276319105, 308827235, 362073310, 552638210, 617654470, 724146620, 1050012599, 1105276420, 1235308940, 2100025198, 4200050396, 5250062995, 10500125990, 21000251980]

約数ペア:

[(1, 21000251980), (2, 10500125990), (4, 5250062995), (5, 4200050396), (10, 2100025198), (17, 1235308940), (19, 1105276420), (20, 1050012599), (29, 724146620), (34, 617654470), (38, 552638210), (58, 362073310), (68, 308827235), (76, 276319105), (85, 247061788), (95, 221055284), (116, 181036655), (145, 144829324), (170, 123530894), (190, 110527642), (290, 72414662), (323, 65016260), (340, 61765447), (380, 55263821), (493, 42596860), (551, 38112980), (580, 36207331), (646, 32508130), (986, 21298430), (1102, 19056490), (1292, 16254065), (1615, 13003252), (1972, 10649215), (2204, 9528245), (2465, 8519372), (2755, 7622596), (3230, 6501626), (4930, 4259686), (5510, 3811298), (6460, 3250813), (9367, 2241940), (9860, 2129843), (11020, 1905649), (18734, 1120970), (37468, 560485), (46835, 448388), (93670, 224194), (112097, 187340)]