20484320

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^2\times {\mathrm{443}}^1$

素因数の和:492

約数の個数: 72

約数和(自身を含む): 51524424

約数和(自身を除く): 31040104

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 68, 80, 85, 136, 160, 170, 272, 289, 340, 443, 544, 578, 680, 886, 1156, 1360, 1445, 1772, 2215, 2312, 2720, 2890, 3544, 4430, 4624, 5780, 7088, 7531, 8860, 9248, 11560, 14176, 15062, 17720, 23120, 30124, 35440, 37655, 46240, 60248, 70880, 75310, 120496, 128027, 150620, 240992, 256054, 301240, 512108, 602480, 640135, 1024216, 1204960, 1280270, 2048432, 2560540, 4096864, 5121080, 10242160, 20484320]

約数ペア:

[(1, 20484320), (2, 10242160), (4, 5121080), (5, 4096864), (8, 2560540), (10, 2048432), (16, 1280270), (17, 1204960), (20, 1024216), (32, 640135), (34, 602480), (40, 512108), (68, 301240), (80, 256054), (85, 240992), (136, 150620), (160, 128027), (170, 120496), (272, 75310), (289, 70880), (340, 60248), (443, 46240), (544, 37655), (578, 35440), (680, 30124), (886, 23120), (1156, 17720), (1360, 15062), (1445, 14176), (1772, 11560), (2215, 9248), (2312, 8860), (2720, 7531), (2890, 7088), (3544, 5780), (4430, 4624)]