21523840

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^2\times {\mathrm{199}}^1$

素因数の和:244

約数の個数: 96

約数和(自身を含む): 55998000

約数和(自身を除く): 34474160

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 169, 199, 208, 260, 320, 338, 398, 416, 520, 640, 676, 796, 832, 845, 995, 1040, 1352, 1592, 1664, 1690, 1990, 2080, 2587, 2704, 3184, 3380, 3980, 4160, 5174, 5408, 6368, 6760, 7960, 8320, 10348, 10816, 12736, 12935, 13520, 15920, 20696, 21632, 25472, 25870, 27040, 31840, 33631, 41392, 51740, 54080, 63680, 67262, 82784, 103480, 108160, 127360, 134524, 165568, 168155, 206960, 269048, 331136, 336310, 413920, 538096, 672620, 827840, 1076192, 1345240, 1655680, 2152384, 2690480, 4304768, 5380960, 10761920, 21523840]

約数ペア:

[(1, 21523840), (2, 10761920), (4, 5380960), (5, 4304768), (8, 2690480), (10, 2152384), (13, 1655680), (16, 1345240), (20, 1076192), (26, 827840), (32, 672620), (40, 538096), (52, 413920), (64, 336310), (65, 331136), (80, 269048), (104, 206960), (128, 168155), (130, 165568), (160, 134524), (169, 127360), (199, 108160), (208, 103480), (260, 82784), (320, 67262), (338, 63680), (398, 54080), (416, 51740), (520, 41392), (640, 33631), (676, 31840), (796, 27040), (832, 25870), (845, 25472), (995, 21632), (1040, 20696), (1352, 15920), (1592, 13520), (1664, 12935), (1690, 12736), (1990, 10816), (2080, 10348), (2587, 8320), (2704, 7960), (3184, 6760), (3380, 6368), (3980, 5408), (4160, 5174)]