205201720

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{211}}^1\times {\mathrm{593}}^1$

素因数の和:856

約数の個数: 64

約数和(自身を含む): 476007840

約数和(自身を除く): 270806120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 211, 328, 410, 422, 593, 820, 844, 1055, 1186, 1640, 1688, 2110, 2372, 2965, 4220, 4744, 5930, 8440, 8651, 11860, 17302, 23720, 24313, 34604, 43255, 48626, 69208, 86510, 97252, 121565, 125123, 173020, 194504, 243130, 250246, 346040, 486260, 500492, 625615, 972520, 1000984, 1251230, 2502460, 5004920, 5130043, 10260086, 20520172, 25650215, 41040344, 51300430, 102600860, 205201720]

約数ペア:

[(1, 205201720), (2, 102600860), (4, 51300430), (5, 41040344), (8, 25650215), (10, 20520172), (20, 10260086), (40, 5130043), (41, 5004920), (82, 2502460), (164, 1251230), (205, 1000984), (211, 972520), (328, 625615), (410, 500492), (422, 486260), (593, 346040), (820, 250246), (844, 243130), (1055, 194504), (1186, 173020), (1640, 125123), (1688, 121565), (2110, 97252), (2372, 86510), (2965, 69208), (4220, 48626), (4744, 43255), (5930, 34604), (8440, 24313), (8651, 23720), (11860, 17302)]