20729440

素因数分解:

$2^5\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{131}}^1$

素因数の和:212

約数の個数: 96

約数和(自身を含む): 52690176

約数和(自身を除く): 31960736

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 32, 40, 43, 46, 80, 86, 92, 115, 131, 160, 172, 184, 215, 230, 262, 344, 368, 430, 460, 524, 655, 688, 736, 860, 920, 989, 1048, 1310, 1376, 1720, 1840, 1978, 2096, 2620, 3013, 3440, 3680, 3956, 4192, 4945, 5240, 5633, 6026, 6880, 7912, 9890, 10480, 11266, 12052, 15065, 15824, 19780, 20960, 22532, 24104, 28165, 30130, 31648, 39560, 45064, 48208, 56330, 60260, 79120, 90128, 96416, 112660, 120520, 129559, 158240, 180256, 225320, 241040, 259118, 450640, 482080, 518236, 647795, 901280, 1036472, 1295590, 2072944, 2591180, 4145888, 5182360, 10364720, 20729440]

約数ペア:

[(1, 20729440), (2, 10364720), (4, 5182360), (5, 4145888), (8, 2591180), (10, 2072944), (16, 1295590), (20, 1036472), (23, 901280), (32, 647795), (40, 518236), (43, 482080), (46, 450640), (80, 259118), (86, 241040), (92, 225320), (115, 180256), (131, 158240), (160, 129559), (172, 120520), (184, 112660), (215, 96416), (230, 90128), (262, 79120), (344, 60260), (368, 56330), (430, 48208), (460, 45064), (524, 39560), (655, 31648), (688, 30130), (736, 28165), (860, 24104), (920, 22532), (989, 20960), (1048, 19780), (1310, 15824), (1376, 15065), (1720, 12052), (1840, 11266), (1978, 10480), (2096, 9890), (2620, 7912), (3013, 6880), (3440, 6026), (3680, 5633), (3956, 5240), (4192, 4945)]