21281440

素因数分解:

$2^5\times 5^1\times {\mathrm{23}}^1\times {\mathrm{5783}}^1$

素因数の和:5821

約数の個数: 48

約数和(自身を含む): 52472448

約数和(自身を除く): 31191008

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 32, 40, 46, 80, 92, 115, 160, 184, 230, 368, 460, 736, 920, 1840, 3680, 5783, 11566, 23132, 28915, 46264, 57830, 92528, 115660, 133009, 185056, 231320, 266018, 462640, 532036, 665045, 925280, 1064072, 1330090, 2128144, 2660180, 4256288, 5320360, 10640720, 21281440]

約数ペア:

[(1, 21281440), (2, 10640720), (4, 5320360), (5, 4256288), (8, 2660180), (10, 2128144), (16, 1330090), (20, 1064072), (23, 925280), (32, 665045), (40, 532036), (46, 462640), (80, 266018), (92, 231320), (115, 185056), (160, 133009), (184, 115660), (230, 92528), (368, 57830), (460, 46264), (736, 28915), (920, 23132), (1840, 11566), (3680, 5783)]