20900480

素因数分解:

$2^7\times 5^1\times {\mathrm{17}}^2\times {\mathrm{113}}^1$

素因数の和:166

約数の個数: 96

約数和(自身を含む): 53546940

約数和(自身を除く): 32646460

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 113, 128, 136, 160, 170, 226, 272, 289, 320, 340, 452, 544, 565, 578, 640, 680, 904, 1088, 1130, 1156, 1360, 1445, 1808, 1921, 2176, 2260, 2312, 2720, 2890, 3616, 3842, 4520, 4624, 5440, 5780, 7232, 7684, 9040, 9248, 9605, 10880, 11560, 14464, 15368, 18080, 18496, 19210, 23120, 30736, 32657, 36160, 36992, 38420, 46240, 61472, 65314, 72320, 76840, 92480, 122944, 130628, 153680, 163285, 184960, 245888, 261256, 307360, 326570, 522512, 614720, 653140, 1045024, 1229440, 1306280, 2090048, 2612560, 4180096, 5225120, 10450240, 20900480]

約数ペア:

[(1, 20900480), (2, 10450240), (4, 5225120), (5, 4180096), (8, 2612560), (10, 2090048), (16, 1306280), (17, 1229440), (20, 1045024), (32, 653140), (34, 614720), (40, 522512), (64, 326570), (68, 307360), (80, 261256), (85, 245888), (113, 184960), (128, 163285), (136, 153680), (160, 130628), (170, 122944), (226, 92480), (272, 76840), (289, 72320), (320, 65314), (340, 61472), (452, 46240), (544, 38420), (565, 36992), (578, 36160), (640, 32657), (680, 30736), (904, 23120), (1088, 19210), (1130, 18496), (1156, 18080), (1360, 15368), (1445, 14464), (1808, 11560), (1921, 10880), (2176, 9605), (2260, 9248), (2312, 9040), (2720, 7684), (2890, 7232), (3616, 5780), (3842, 5440), (4520, 4624)]