21800320

素因数分解:

$2^7\times 5^1\times {\mathrm{23}}^1\times {\mathrm{1481}}^1$

素因数の和:1523

約数の個数: 64

約数和(自身を含む): 54419040

約数和(自身を除く): 32618720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 32, 40, 46, 64, 80, 92, 115, 128, 160, 184, 230, 320, 368, 460, 640, 736, 920, 1472, 1481, 1840, 2944, 2962, 3680, 5924, 7360, 7405, 11848, 14720, 14810, 23696, 29620, 34063, 47392, 59240, 68126, 94784, 118480, 136252, 170315, 189568, 236960, 272504, 340630, 473920, 545008, 681260, 947840, 1090016, 1362520, 2180032, 2725040, 4360064, 5450080, 10900160, 21800320]

約数ペア:

[(1, 21800320), (2, 10900160), (4, 5450080), (5, 4360064), (8, 2725040), (10, 2180032), (16, 1362520), (20, 1090016), (23, 947840), (32, 681260), (40, 545008), (46, 473920), (64, 340630), (80, 272504), (92, 236960), (115, 189568), (128, 170315), (160, 136252), (184, 118480), (230, 94784), (320, 68126), (368, 59240), (460, 47392), (640, 34063), (736, 29620), (920, 23696), (1472, 14810), (1481, 14720), (1840, 11848), (2944, 7405), (2962, 7360), (3680, 5924)]