21115840

素因数分解:

$2^6\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{151}}^1$

素因数の和:210

約数の個数: 112

約数和(自身を含む): 55595520

約数和(自身を除く): 34479680

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 23, 32, 38, 40, 46, 64, 76, 80, 92, 95, 115, 151, 152, 160, 184, 190, 230, 302, 304, 320, 368, 380, 437, 460, 604, 608, 736, 755, 760, 874, 920, 1208, 1216, 1472, 1510, 1520, 1748, 1840, 2185, 2416, 2869, 3020, 3040, 3473, 3496, 3680, 4370, 4832, 5738, 6040, 6080, 6946, 6992, 7360, 8740, 9664, 11476, 12080, 13892, 13984, 14345, 17365, 17480, 22952, 24160, 27784, 27968, 28690, 34730, 34960, 45904, 48320, 55568, 57380, 65987, 69460, 69920, 91808, 111136, 114760, 131974, 138920, 139840, 183616, 222272, 229520, 263948, 277840, 329935, 459040, 527896, 555680, 659870, 918080, 1055792, 1111360, 1319740, 2111584, 2639480, 4223168, 5278960, 10557920, 21115840]

約数ペア:

[(1, 21115840), (2, 10557920), (4, 5278960), (5, 4223168), (8, 2639480), (10, 2111584), (16, 1319740), (19, 1111360), (20, 1055792), (23, 918080), (32, 659870), (38, 555680), (40, 527896), (46, 459040), (64, 329935), (76, 277840), (80, 263948), (92, 229520), (95, 222272), (115, 183616), (151, 139840), (152, 138920), (160, 131974), (184, 114760), (190, 111136), (230, 91808), (302, 69920), (304, 69460), (320, 65987), (368, 57380), (380, 55568), (437, 48320), (460, 45904), (604, 34960), (608, 34730), (736, 28690), (755, 27968), (760, 27784), (874, 24160), (920, 22952), (1208, 17480), (1216, 17365), (1472, 14345), (1510, 13984), (1520, 13892), (1748, 12080), (1840, 11476), (2185, 9664), (2416, 8740), (2869, 7360), (3020, 6992), (3040, 6946), (3473, 6080), (3496, 6040), (3680, 5738), (4370, 4832)]