20970880

素因数分解:

$2^7\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{151}}^1$

素因数の和:208

約数の個数: 128

約数和(自身を含む): 59535360

約数和(自身を除く): 38564480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 31, 32, 35, 40, 56, 62, 64, 70, 80, 112, 124, 128, 140, 151, 155, 160, 217, 224, 248, 280, 302, 310, 320, 434, 448, 496, 560, 604, 620, 640, 755, 868, 896, 992, 1057, 1085, 1120, 1208, 1240, 1510, 1736, 1984, 2114, 2170, 2240, 2416, 2480, 3020, 3472, 3968, 4228, 4340, 4480, 4681, 4832, 4960, 5285, 6040, 6944, 8456, 8680, 9362, 9664, 9920, 10570, 12080, 13888, 16912, 17360, 18724, 19328, 19840, 21140, 23405, 24160, 27776, 32767, 33824, 34720, 37448, 42280, 46810, 48320, 65534, 67648, 69440, 74896, 84560, 93620, 96640, 131068, 135296, 138880, 149792, 163835, 169120, 187240, 262136, 299584, 327670, 338240, 374480, 524272, 599168, 655340, 676480, 748960, 1048544, 1310680, 1497920, 2097088, 2621360, 2995840, 4194176, 5242720, 10485440, 20970880]

約数ペア:

[(1, 20970880), (2, 10485440), (4, 5242720), (5, 4194176), (7, 2995840), (8, 2621360), (10, 2097088), (14, 1497920), (16, 1310680), (20, 1048544), (28, 748960), (31, 676480), (32, 655340), (35, 599168), (40, 524272), (56, 374480), (62, 338240), (64, 327670), (70, 299584), (80, 262136), (112, 187240), (124, 169120), (128, 163835), (140, 149792), (151, 138880), (155, 135296), (160, 131068), (217, 96640), (224, 93620), (248, 84560), (280, 74896), (302, 69440), (310, 67648), (320, 65534), (434, 48320), (448, 46810), (496, 42280), (560, 37448), (604, 34720), (620, 33824), (640, 32767), (755, 27776), (868, 24160), (896, 23405), (992, 21140), (1057, 19840), (1085, 19328), (1120, 18724), (1208, 17360), (1240, 16912), (1510, 13888), (1736, 12080), (1984, 10570), (2114, 9920), (2170, 9664), (2240, 9362), (2416, 8680), (2480, 8456), (3020, 6944), (3472, 6040), (3968, 5285), (4228, 4960), (4340, 4832), (4480, 4681)]