20459560400

素因数分解:

$2^4\times 5^2\times {\mathrm{317}}^2\times {\mathrm{509}}^1$

素因数の和:1161

約数の個数: 90

約数和(自身を含む): 49406518770

約数和(自身を除く): 28946958370

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 317, 400, 509, 634, 1018, 1268, 1585, 2036, 2536, 2545, 3170, 4072, 5072, 5090, 6340, 7925, 8144, 10180, 12680, 12725, 15850, 20360, 25360, 25450, 31700, 40720, 50900, 63400, 100489, 101800, 126800, 161353, 200978, 203600, 322706, 401956, 502445, 645412, 803912, 806765, 1004890, 1290824, 1607824, 1613530, 2009780, 2512225, 2581648, 3227060, 4019560, 4033825, 5024450, 6454120, 8039120, 8067650, 10048900, 12908240, 16135300, 20097800, 32270600, 40195600, 51148901, 64541200, 102297802, 204595604, 255744505, 409191208, 511489010, 818382416, 1022978020, 1278722525, 2045956040, 2557445050, 4091912080, 5114890100, 10229780200, 20459560400]

約数ペア:

[(1, 20459560400), (2, 10229780200), (4, 5114890100), (5, 4091912080), (8, 2557445050), (10, 2045956040), (16, 1278722525), (20, 1022978020), (25, 818382416), (40, 511489010), (50, 409191208), (80, 255744505), (100, 204595604), (200, 102297802), (317, 64541200), (400, 51148901), (509, 40195600), (634, 32270600), (1018, 20097800), (1268, 16135300), (1585, 12908240), (2036, 10048900), (2536, 8067650), (2545, 8039120), (3170, 6454120), (4072, 5024450), (5072, 4033825), (5090, 4019560), (6340, 3227060), (7925, 2581648), (8144, 2512225), (10180, 2009780), (12680, 1613530), (12725, 1607824), (15850, 1290824), (20360, 1004890), (25360, 806765), (25450, 803912), (31700, 645412), (40720, 502445), (50900, 401956), (63400, 322706), (100489, 203600), (101800, 200978), (126800, 161353)]