21389440

素因数分解:

$2^7\times 5^1\times {\mathrm{19}}^1\times {\mathrm{1759}}^1$

素因数の和:1797

約数の個数: 64

約数和(自身を含む): 53856000

約数和(自身を除く): 32466560

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 64, 76, 80, 95, 128, 152, 160, 190, 304, 320, 380, 608, 640, 760, 1216, 1520, 1759, 2432, 3040, 3518, 6080, 7036, 8795, 12160, 14072, 17590, 28144, 33421, 35180, 56288, 66842, 70360, 112576, 133684, 140720, 167105, 225152, 267368, 281440, 334210, 534736, 562880, 668420, 1069472, 1125760, 1336840, 2138944, 2673680, 4277888, 5347360, 10694720, 21389440]

約数ペア:

[(1, 21389440), (2, 10694720), (4, 5347360), (5, 4277888), (8, 2673680), (10, 2138944), (16, 1336840), (19, 1125760), (20, 1069472), (32, 668420), (38, 562880), (40, 534736), (64, 334210), (76, 281440), (80, 267368), (95, 225152), (128, 167105), (152, 140720), (160, 133684), (190, 112576), (304, 70360), (320, 66842), (380, 56288), (608, 35180), (640, 33421), (760, 28144), (1216, 17590), (1520, 14072), (1759, 12160), (2432, 8795), (3040, 7036), (3518, 6080)]