19957520

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{22679}}^1$

素因数の和:22703

約数の個数: 40

約数和(自身を含む): 50621760

約数和(自身を除く): 30664240

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 22679, 45358, 90716, 113395, 181432, 226790, 249469, 362864, 453580, 498938, 907160, 997876, 1247345, 1814320, 1995752, 2494690, 3991504, 4989380, 9978760, 19957520]

約数ペア:

[(1, 19957520), (2, 9978760), (4, 4989380), (5, 3991504), (8, 2494690), (10, 1995752), (11, 1814320), (16, 1247345), (20, 997876), (22, 907160), (40, 498938), (44, 453580), (55, 362864), (80, 249469), (88, 226790), (110, 181432), (176, 113395), (220, 90716), (440, 45358), (880, 22679)]