20475520

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{107}}^1$

素因数の和:162

約数の個数: 128

約数和(自身を含む): 55520640

約数和(自身を除く): 35045120

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 23, 26, 32, 40, 46, 52, 64, 65, 80, 92, 104, 107, 115, 128, 130, 160, 184, 208, 214, 230, 260, 299, 320, 368, 416, 428, 460, 520, 535, 598, 640, 736, 832, 856, 920, 1040, 1070, 1196, 1391, 1472, 1495, 1664, 1712, 1840, 2080, 2140, 2392, 2461, 2782, 2944, 2990, 3424, 3680, 4160, 4280, 4784, 4922, 5564, 5980, 6848, 6955, 7360, 8320, 8560, 9568, 9844, 11128, 11960, 12305, 13696, 13910, 14720, 17120, 19136, 19688, 22256, 23920, 24610, 27820, 31993, 34240, 38272, 39376, 44512, 47840, 49220, 55640, 63986, 68480, 78752, 89024, 95680, 98440, 111280, 127972, 157504, 159965, 178048, 191360, 196880, 222560, 255944, 315008, 319930, 393760, 445120, 511888, 639860, 787520, 890240, 1023776, 1279720, 1575040, 2047552, 2559440, 4095104, 5118880, 10237760, 20475520]

約数ペア:

[(1, 20475520), (2, 10237760), (4, 5118880), (5, 4095104), (8, 2559440), (10, 2047552), (13, 1575040), (16, 1279720), (20, 1023776), (23, 890240), (26, 787520), (32, 639860), (40, 511888), (46, 445120), (52, 393760), (64, 319930), (65, 315008), (80, 255944), (92, 222560), (104, 196880), (107, 191360), (115, 178048), (128, 159965), (130, 157504), (160, 127972), (184, 111280), (208, 98440), (214, 95680), (230, 89024), (260, 78752), (299, 68480), (320, 63986), (368, 55640), (416, 49220), (428, 47840), (460, 44512), (520, 39376), (535, 38272), (598, 34240), (640, 31993), (736, 27820), (832, 24610), (856, 23920), (920, 22256), (1040, 19688), (1070, 19136), (1196, 17120), (1391, 14720), (1472, 13910), (1495, 13696), (1664, 12305), (1712, 11960), (1840, 11128), (2080, 9844), (2140, 9568), (2392, 8560), (2461, 8320), (2782, 7360), (2944, 6955), (2990, 6848), (3424, 5980), (3680, 5564), (4160, 4922), (4280, 4784)]