20726720

素因数分解:

$2^6\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{487}}^1$

素因数の和:530

約数の個数: 112

約数和(自身を含む): 59496960

約数和(自身を除く): 38770240

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 19, 20, 28, 32, 35, 38, 40, 56, 64, 70, 76, 80, 95, 112, 133, 140, 152, 160, 190, 224, 266, 280, 304, 320, 380, 448, 487, 532, 560, 608, 665, 760, 974, 1064, 1120, 1216, 1330, 1520, 1948, 2128, 2240, 2435, 2660, 3040, 3409, 3896, 4256, 4870, 5320, 6080, 6818, 7792, 8512, 9253, 9740, 10640, 13636, 15584, 17045, 18506, 19480, 21280, 27272, 31168, 34090, 37012, 38960, 42560, 46265, 54544, 64771, 68180, 74024, 77920, 92530, 109088, 129542, 136360, 148048, 155840, 185060, 218176, 259084, 272720, 296096, 323855, 370120, 518168, 545440, 592192, 647710, 740240, 1036336, 1090880, 1295420, 1480480, 2072672, 2590840, 2960960, 4145344, 5181680, 10363360, 20726720]

約数ペア:

[(1, 20726720), (2, 10363360), (4, 5181680), (5, 4145344), (7, 2960960), (8, 2590840), (10, 2072672), (14, 1480480), (16, 1295420), (19, 1090880), (20, 1036336), (28, 740240), (32, 647710), (35, 592192), (38, 545440), (40, 518168), (56, 370120), (64, 323855), (70, 296096), (76, 272720), (80, 259084), (95, 218176), (112, 185060), (133, 155840), (140, 148048), (152, 136360), (160, 129542), (190, 109088), (224, 92530), (266, 77920), (280, 74024), (304, 68180), (320, 64771), (380, 54544), (448, 46265), (487, 42560), (532, 38960), (560, 37012), (608, 34090), (665, 31168), (760, 27272), (974, 21280), (1064, 19480), (1120, 18506), (1216, 17045), (1330, 15584), (1520, 13636), (1948, 10640), (2128, 9740), (2240, 9253), (2435, 8512), (2660, 7792), (3040, 6818), (3409, 6080), (3896, 5320), (4256, 4870)]