21086770

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1$

素因数の和:187

約数の個数: 64

約数和(自身を含む): 42768000

約数和(自身を除く): 21681230

約数列:

[1, 2, 5, 10, 19, 29, 38, 43, 58, 86, 89, 95, 145, 178, 190, 215, 290, 430, 445, 551, 817, 890, 1102, 1247, 1634, 1691, 2494, 2581, 2755, 3382, 3827, 4085, 5162, 5510, 6235, 7654, 8170, 8455, 12470, 12905, 16910, 19135, 23693, 25810, 38270, 47386, 49039, 72713, 98078, 110983, 118465, 145426, 221966, 236930, 245195, 363565, 490390, 554915, 727130, 1109830, 2108677, 4217354, 10543385, 21086770]

約数ペア:

[(1, 21086770), (2, 10543385), (5, 4217354), (10, 2108677), (19, 1109830), (29, 727130), (38, 554915), (43, 490390), (58, 363565), (86, 245195), (89, 236930), (95, 221966), (145, 145426), (178, 118465), (190, 110983), (215, 98078), (290, 72713), (430, 49039), (445, 47386), (551, 38270), (817, 25810), (890, 23693), (1102, 19135), (1247, 16910), (1634, 12905), (1691, 12470), (2494, 8455), (2581, 8170), (2755, 7654), (3382, 6235), (3827, 5510), (4085, 5162)]