21378960

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{1291}}^1$

素因数の和:1333

約数の個数: 120

約数和(自身を含む): 74977344

約数和(自身を除く): 53598384

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 23, 24, 30, 36, 40, 45, 46, 48, 60, 69, 72, 80, 90, 92, 115, 120, 138, 144, 180, 184, 207, 230, 240, 276, 345, 360, 368, 414, 460, 552, 690, 720, 828, 920, 1035, 1104, 1291, 1380, 1656, 1840, 2070, 2582, 2760, 3312, 3873, 4140, 5164, 5520, 6455, 7746, 8280, 10328, 11619, 12910, 15492, 16560, 19365, 20656, 23238, 25820, 29693, 30984, 38730, 46476, 51640, 58095, 59386, 61968, 77460, 89079, 92952, 103280, 116190, 118772, 148465, 154920, 178158, 185904, 232380, 237544, 267237, 296930, 309840, 356316, 445395, 464760, 475088, 534474, 593860, 712632, 890790, 929520, 1068948, 1187720, 1336185, 1425264, 1781580, 2137896, 2375440, 2672370, 3563160, 4275792, 5344740, 7126320, 10689480, 21378960]

約数ペア:

[(1, 21378960), (2, 10689480), (3, 7126320), (4, 5344740), (5, 4275792), (6, 3563160), (8, 2672370), (9, 2375440), (10, 2137896), (12, 1781580), (15, 1425264), (16, 1336185), (18, 1187720), (20, 1068948), (23, 929520), (24, 890790), (30, 712632), (36, 593860), (40, 534474), (45, 475088), (46, 464760), (48, 445395), (60, 356316), (69, 309840), (72, 296930), (80, 267237), (90, 237544), (92, 232380), (115, 185904), (120, 178158), (138, 154920), (144, 148465), (180, 118772), (184, 116190), (207, 103280), (230, 92952), (240, 89079), (276, 77460), (345, 61968), (360, 59386), (368, 58095), (414, 51640), (460, 46476), (552, 38730), (690, 30984), (720, 29693), (828, 25820), (920, 23238), (1035, 20656), (1104, 19365), (1291, 16560), (1380, 15492), (1656, 12910), (1840, 11619), (2070, 10328), (2582, 8280), (2760, 7746), (3312, 6455), (3873, 5520), (4140, 5164)]