20455680

素因数分解:

$2^8\times 3^1\times 5^1\times 7^1\times {\mathrm{761}}^1$

素因数の和:792

約数の個数: 144

約数和(自身を含む): 74761344

約数和(自身を除く): 54305664

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 32, 35, 40, 42, 48, 56, 60, 64, 70, 80, 84, 96, 105, 112, 120, 128, 140, 160, 168, 192, 210, 224, 240, 256, 280, 320, 336, 384, 420, 448, 480, 560, 640, 672, 761, 768, 840, 896, 960, 1120, 1280, 1344, 1522, 1680, 1792, 1920, 2240, 2283, 2688, 3044, 3360, 3805, 3840, 4480, 4566, 5327, 5376, 6088, 6720, 7610, 8960, 9132, 10654, 11415, 12176, 13440, 15220, 15981, 18264, 21308, 22830, 24352, 26635, 26880, 30440, 31962, 36528, 42616, 45660, 48704, 53270, 60880, 63924, 73056, 79905, 85232, 91320, 97408, 106540, 121760, 127848, 146112, 159810, 170464, 182640, 194816, 213080, 243520, 255696, 292224, 319620, 340928, 365280, 426160, 487040, 511392, 584448, 639240, 681856, 730560, 852320, 974080, 1022784, 1278480, 1363712, 1461120, 1704640, 2045568, 2556960, 2922240, 3409280, 4091136, 5113920, 6818560, 10227840, 20455680]

約数ペア:

[(1, 20455680), (2, 10227840), (3, 6818560), (4, 5113920), (5, 4091136), (6, 3409280), (7, 2922240), (8, 2556960), (10, 2045568), (12, 1704640), (14, 1461120), (15, 1363712), (16, 1278480), (20, 1022784), (21, 974080), (24, 852320), (28, 730560), (30, 681856), (32, 639240), (35, 584448), (40, 511392), (42, 487040), (48, 426160), (56, 365280), (60, 340928), (64, 319620), (70, 292224), (80, 255696), (84, 243520), (96, 213080), (105, 194816), (112, 182640), (120, 170464), (128, 159810), (140, 146112), (160, 127848), (168, 121760), (192, 106540), (210, 97408), (224, 91320), (240, 85232), (256, 79905), (280, 73056), (320, 63924), (336, 60880), (384, 53270), (420, 48704), (448, 45660), (480, 42616), (560, 36528), (640, 31962), (672, 30440), (761, 26880), (768, 26635), (840, 24352), (896, 22830), (960, 21308), (1120, 18264), (1280, 15981), (1344, 15220), (1522, 13440), (1680, 12176), (1792, 11415), (1920, 10654), (2240, 9132), (2283, 8960), (2688, 7610), (3044, 6720), (3360, 6088), (3805, 5376), (3840, 5327), (4480, 4566)]