81283840

素因数分解:

$2^8\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{251}}^1$

素因数の和:306

約数の個数: 144

約数和(自身を含む): 222518016

約数和(自身を除く): 141234176

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 23, 32, 40, 44, 46, 55, 64, 80, 88, 92, 110, 115, 128, 160, 176, 184, 220, 230, 251, 253, 256, 320, 352, 368, 440, 460, 502, 506, 640, 704, 736, 880, 920, 1004, 1012, 1255, 1265, 1280, 1408, 1472, 1760, 1840, 2008, 2024, 2510, 2530, 2761, 2816, 2944, 3520, 3680, 4016, 4048, 5020, 5060, 5522, 5773, 5888, 7040, 7360, 8032, 8096, 10040, 10120, 11044, 11546, 13805, 14080, 14720, 16064, 16192, 20080, 20240, 22088, 23092, 27610, 28865, 29440, 32128, 32384, 40160, 40480, 44176, 46184, 55220, 57730, 63503, 64256, 64768, 80320, 80960, 88352, 92368, 110440, 115460, 127006, 160640, 161920, 176704, 184736, 220880, 230920, 254012, 317515, 321280, 323840, 353408, 369472, 441760, 461840, 508024, 635030, 706816, 738944, 883520, 923680, 1016048, 1270060, 1477888, 1767040, 1847360, 2032096, 2540120, 3534080, 3694720, 4064192, 5080240, 7389440, 8128384, 10160480, 16256768, 20320960, 40641920, 81283840]

約数ペア:

[(1, 81283840), (2, 40641920), (4, 20320960), (5, 16256768), (8, 10160480), (10, 8128384), (11, 7389440), (16, 5080240), (20, 4064192), (22, 3694720), (23, 3534080), (32, 2540120), (40, 2032096), (44, 1847360), (46, 1767040), (55, 1477888), (64, 1270060), (80, 1016048), (88, 923680), (92, 883520), (110, 738944), (115, 706816), (128, 635030), (160, 508024), (176, 461840), (184, 441760), (220, 369472), (230, 353408), (251, 323840), (253, 321280), (256, 317515), (320, 254012), (352, 230920), (368, 220880), (440, 184736), (460, 176704), (502, 161920), (506, 160640), (640, 127006), (704, 115460), (736, 110440), (880, 92368), (920, 88352), (1004, 80960), (1012, 80320), (1255, 64768), (1265, 64256), (1280, 63503), (1408, 57730), (1472, 55220), (1760, 46184), (1840, 44176), (2008, 40480), (2024, 40160), (2510, 32384), (2530, 32128), (2761, 29440), (2816, 28865), (2944, 27610), (3520, 23092), (3680, 22088), (4016, 20240), (4048, 20080), (5020, 16192), (5060, 16064), (5522, 14720), (5773, 14080), (5888, 13805), (7040, 11546), (7360, 11044), (8032, 10120), (8096, 10040)]