21281280

素因数分解:

$2^9\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{163}}^1$

素因数の和:206

約数の個数: 160

約数和(自身を含む): 72477504

約数和(自身を除く): 51196224

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 17, 20, 24, 30, 32, 34, 40, 48, 51, 60, 64, 68, 80, 85, 96, 102, 120, 128, 136, 160, 163, 170, 192, 204, 240, 255, 256, 272, 320, 326, 340, 384, 408, 480, 489, 510, 512, 544, 640, 652, 680, 768, 815, 816, 960, 978, 1020, 1088, 1280, 1304, 1360, 1536, 1630, 1632, 1920, 1956, 2040, 2176, 2445, 2560, 2608, 2720, 2771, 3260, 3264, 3840, 3912, 4080, 4352, 4890, 5216, 5440, 5542, 6520, 6528, 7680, 7824, 8160, 8313, 8704, 9780, 10432, 10880, 11084, 13040, 13056, 13855, 15648, 16320, 16626, 19560, 20864, 21760, 22168, 26080, 26112, 27710, 31296, 32640, 33252, 39120, 41565, 41728, 43520, 44336, 52160, 55420, 62592, 65280, 66504, 78240, 83130, 83456, 88672, 104320, 110840, 125184, 130560, 133008, 156480, 166260, 177344, 208640, 221680, 250368, 266016, 312960, 332520, 354688, 417280, 443360, 532032, 625920, 665040, 709376, 886720, 1064064, 1251840, 1330080, 1418752, 1773440, 2128128, 2660160, 3546880, 4256256, 5320320, 7093760, 10640640, 21281280]

約数ペア:

[(1, 21281280), (2, 10640640), (3, 7093760), (4, 5320320), (5, 4256256), (6, 3546880), (8, 2660160), (10, 2128128), (12, 1773440), (15, 1418752), (16, 1330080), (17, 1251840), (20, 1064064), (24, 886720), (30, 709376), (32, 665040), (34, 625920), (40, 532032), (48, 443360), (51, 417280), (60, 354688), (64, 332520), (68, 312960), (80, 266016), (85, 250368), (96, 221680), (102, 208640), (120, 177344), (128, 166260), (136, 156480), (160, 133008), (163, 130560), (170, 125184), (192, 110840), (204, 104320), (240, 88672), (255, 83456), (256, 83130), (272, 78240), (320, 66504), (326, 65280), (340, 62592), (384, 55420), (408, 52160), (480, 44336), (489, 43520), (510, 41728), (512, 41565), (544, 39120), (640, 33252), (652, 32640), (680, 31296), (768, 27710), (815, 26112), (816, 26080), (960, 22168), (978, 21760), (1020, 20864), (1088, 19560), (1280, 16626), (1304, 16320), (1360, 15648), (1536, 13855), (1630, 13056), (1632, 13040), (1920, 11084), (1956, 10880), (2040, 10432), (2176, 9780), (2445, 8704), (2560, 8313), (2608, 8160), (2720, 7824), (2771, 7680), (3260, 6528), (3264, 6520), (3840, 5542), (3912, 5440), (4080, 5216), (4352, 4890)]