21000455450

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^2\times {\mathrm{79}}^1\times {\mathrm{163}}^1\times {\mathrm{193}}^1$

素因数の和:473

約数の個数: 144

約数和(自身を含む): 43318120320

約数和(自身を除く): 22317664870

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 79, 130, 158, 163, 169, 193, 325, 326, 338, 386, 395, 650, 790, 815, 845, 965, 1027, 1630, 1690, 1930, 1975, 2054, 2119, 2509, 3950, 4075, 4225, 4238, 4825, 5018, 5135, 8150, 8450, 9650, 10270, 10595, 12545, 12877, 13351, 15247, 21190, 25090, 25675, 25754, 26702, 27547, 30494, 31459, 32617, 51350, 52975, 55094, 62725, 62918, 64385, 65234, 66755, 76235, 105950, 125450, 128770, 133510, 137735, 152470, 157295, 163085, 167401, 198211, 275470, 314590, 321925, 326170, 333775, 334802, 381175, 396422, 408967, 643850, 667550, 688675, 762350, 786475, 815425, 817934, 837005, 991055, 1377350, 1572950, 1630850, 1674010, 1982110, 2044835, 2176213, 2485261, 2576743, 4089670, 4185025, 4352426, 4955275, 4970522, 5153486, 5316571, 8370050, 9910550, 10224175, 10633142, 10881065, 12426305, 12883715, 20448350, 21762130, 24852610, 25767430, 26582855, 32308393, 53165710, 54405325, 62131525, 64418575, 64616786, 108810650, 124263050, 128837150, 132914275, 161541965, 265828550, 323083930, 420009109, 807709825, 840018218, 1615419650, 2100045545, 4200091090, 10500227725, 21000455450]

約数ペア:

[(1, 21000455450), (2, 10500227725), (5, 4200091090), (10, 2100045545), (13, 1615419650), (25, 840018218), (26, 807709825), (50, 420009109), (65, 323083930), (79, 265828550), (130, 161541965), (158, 132914275), (163, 128837150), (169, 124263050), (193, 108810650), (325, 64616786), (326, 64418575), (338, 62131525), (386, 54405325), (395, 53165710), (650, 32308393), (790, 26582855), (815, 25767430), (845, 24852610), (965, 21762130), (1027, 20448350), (1630, 12883715), (1690, 12426305), (1930, 10881065), (1975, 10633142), (2054, 10224175), (2119, 9910550), (2509, 8370050), (3950, 5316571), (4075, 5153486), (4225, 4970522), (4238, 4955275), (4825, 4352426), (5018, 4185025), (5135, 4089670), (8150, 2576743), (8450, 2485261), (9650, 2176213), (10270, 2044835), (10595, 1982110), (12545, 1674010), (12877, 1630850), (13351, 1572950), (15247, 1377350), (21190, 991055), (25090, 837005), (25675, 817934), (25754, 815425), (26702, 786475), (27547, 762350), (30494, 688675), (31459, 667550), (32617, 643850), (51350, 408967), (52975, 396422), (55094, 381175), (62725, 334802), (62918, 333775), (64385, 326170), (65234, 321925), (66755, 314590), (76235, 275470), (105950, 198211), (125450, 167401), (128770, 163085), (133510, 157295), (137735, 152470)]