21756160

素因数分解:

$2^8\times 5^1\times {\mathrm{23}}^1\times {\mathrm{739}}^1$

素因数の和:783

約数の個数: 72

約数和(自身を含む): 54452160

約数和(自身を除く): 32696000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 32, 40, 46, 64, 80, 92, 115, 128, 160, 184, 230, 256, 320, 368, 460, 640, 736, 739, 920, 1280, 1472, 1478, 1840, 2944, 2956, 3680, 3695, 5888, 5912, 7360, 7390, 11824, 14720, 14780, 16997, 23648, 29440, 29560, 33994, 47296, 59120, 67988, 84985, 94592, 118240, 135976, 169970, 189184, 236480, 271952, 339940, 472960, 543904, 679880, 945920, 1087808, 1359760, 2175616, 2719520, 4351232, 5439040, 10878080, 21756160]

約数ペア:

[(1, 21756160), (2, 10878080), (4, 5439040), (5, 4351232), (8, 2719520), (10, 2175616), (16, 1359760), (20, 1087808), (23, 945920), (32, 679880), (40, 543904), (46, 472960), (64, 339940), (80, 271952), (92, 236480), (115, 189184), (128, 169970), (160, 135976), (184, 118240), (230, 94592), (256, 84985), (320, 67988), (368, 59120), (460, 47296), (640, 33994), (736, 29560), (739, 29440), (920, 23648), (1280, 16997), (1472, 14780), (1478, 14720), (1840, 11824), (2944, 7390), (2956, 7360), (3680, 5912), (3695, 5888)]