21261760

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{269}}^1$

素因数の和:318

約数の個数: 112

約数和(自身を含む): 57607200

約数和(自身を除く): 36345440

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 19, 20, 26, 32, 38, 40, 52, 64, 65, 76, 80, 95, 104, 130, 152, 160, 190, 208, 247, 260, 269, 304, 320, 380, 416, 494, 520, 538, 608, 760, 832, 988, 1040, 1076, 1216, 1235, 1345, 1520, 1976, 2080, 2152, 2470, 2690, 3040, 3497, 3952, 4160, 4304, 4940, 5111, 5380, 6080, 6994, 7904, 8608, 9880, 10222, 10760, 13988, 15808, 17216, 17485, 19760, 20444, 21520, 25555, 27976, 34970, 39520, 40888, 43040, 51110, 55952, 66443, 69940, 79040, 81776, 86080, 102220, 111904, 132886, 139880, 163552, 204440, 223808, 265772, 279760, 327104, 332215, 408880, 531544, 559520, 664430, 817760, 1063088, 1119040, 1328860, 1635520, 2126176, 2657720, 4252352, 5315440, 10630880, 21261760]

約数ペア:

[(1, 21261760), (2, 10630880), (4, 5315440), (5, 4252352), (8, 2657720), (10, 2126176), (13, 1635520), (16, 1328860), (19, 1119040), (20, 1063088), (26, 817760), (32, 664430), (38, 559520), (40, 531544), (52, 408880), (64, 332215), (65, 327104), (76, 279760), (80, 265772), (95, 223808), (104, 204440), (130, 163552), (152, 139880), (160, 132886), (190, 111904), (208, 102220), (247, 86080), (260, 81776), (269, 79040), (304, 69940), (320, 66443), (380, 55952), (416, 51110), (494, 43040), (520, 40888), (538, 39520), (608, 34970), (760, 27976), (832, 25555), (988, 21520), (1040, 20444), (1076, 19760), (1216, 17485), (1235, 17216), (1345, 15808), (1520, 13988), (1976, 10760), (2080, 10222), (2152, 9880), (2470, 8608), (2690, 7904), (3040, 6994), (3497, 6080), (3952, 5380), (4160, 5111), (4304, 4940)]