20578720

素因数分解:

$2^5\times 5^1\times {\mathrm{41}}^1\times {\mathrm{3137}}^1$

素因数の和:3193

約数の個数: 48

約数和(自身を含む): 49818888

約数和(自身を除く): 29240168

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 80, 82, 160, 164, 205, 328, 410, 656, 820, 1312, 1640, 3137, 3280, 6274, 6560, 12548, 15685, 25096, 31370, 50192, 62740, 100384, 125480, 128617, 250960, 257234, 501920, 514468, 643085, 1028936, 1286170, 2057872, 2572340, 4115744, 5144680, 10289360, 20578720]

約数ペア:

[(1, 20578720), (2, 10289360), (4, 5144680), (5, 4115744), (8, 2572340), (10, 2057872), (16, 1286170), (20, 1028936), (32, 643085), (40, 514468), (41, 501920), (80, 257234), (82, 250960), (160, 128617), (164, 125480), (205, 100384), (328, 62740), (410, 50192), (656, 31370), (820, 25096), (1312, 15685), (1640, 12548), (3137, 6560), (3280, 6274)]