28116880

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{359}}^1$

素因数の和:472

約数の個数: 80

約数和(自身を含む): 72316800

約数和(自身を除く): 44199920

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 89, 110, 176, 178, 220, 356, 359, 440, 445, 712, 718, 880, 890, 979, 1424, 1436, 1780, 1795, 1958, 2872, 3560, 3590, 3916, 3949, 4895, 5744, 7120, 7180, 7832, 7898, 9790, 14360, 15664, 15796, 19580, 19745, 28720, 31592, 31951, 39160, 39490, 63184, 63902, 78320, 78980, 127804, 157960, 159755, 255608, 315920, 319510, 351461, 511216, 639020, 702922, 1278040, 1405844, 1757305, 2556080, 2811688, 3514610, 5623376, 7029220, 14058440, 28116880]

約数ペア:

[(1, 28116880), (2, 14058440), (4, 7029220), (5, 5623376), (8, 3514610), (10, 2811688), (11, 2556080), (16, 1757305), (20, 1405844), (22, 1278040), (40, 702922), (44, 639020), (55, 511216), (80, 351461), (88, 319510), (89, 315920), (110, 255608), (176, 159755), (178, 157960), (220, 127804), (356, 78980), (359, 78320), (440, 63902), (445, 63184), (712, 39490), (718, 39160), (880, 31951), (890, 31592), (979, 28720), (1424, 19745), (1436, 19580), (1780, 15796), (1795, 15664), (1958, 14360), (2872, 9790), (3560, 7898), (3590, 7832), (3916, 7180), (3949, 7120), (4895, 5744)]