20437760

素因数分解:

$2^8\times 5^1\times 7^1\times {\mathrm{2281}}^1$

素因数の和:2309

約数の個数: 72

約数和(自身を含む): 55972896

約数和(自身を除く): 35535136

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 64, 70, 80, 112, 128, 140, 160, 224, 256, 280, 320, 448, 560, 640, 896, 1120, 1280, 1792, 2240, 2281, 4480, 4562, 8960, 9124, 11405, 15967, 18248, 22810, 31934, 36496, 45620, 63868, 72992, 79835, 91240, 127736, 145984, 159670, 182480, 255472, 291968, 319340, 364960, 510944, 583936, 638680, 729920, 1021888, 1277360, 1459840, 2043776, 2554720, 2919680, 4087552, 5109440, 10218880, 20437760]

約数ペア:

[(1, 20437760), (2, 10218880), (4, 5109440), (5, 4087552), (7, 2919680), (8, 2554720), (10, 2043776), (14, 1459840), (16, 1277360), (20, 1021888), (28, 729920), (32, 638680), (35, 583936), (40, 510944), (56, 364960), (64, 319340), (70, 291968), (80, 255472), (112, 182480), (128, 159670), (140, 145984), (160, 127736), (224, 91240), (256, 79835), (280, 72992), (320, 63868), (448, 45620), (560, 36496), (640, 31934), (896, 22810), (1120, 18248), (1280, 15967), (1792, 11405), (2240, 9124), (2281, 8960), (4480, 4562)]