81900980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{97}}^1\times {\mathrm{163}}^1$

素因数の和:313

約数の個数: 96

約数和(自身を含む): 205207296

約数和(自身を除く): 123306316

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 37, 70, 74, 97, 140, 148, 163, 185, 194, 259, 326, 370, 388, 485, 518, 652, 679, 740, 815, 970, 1036, 1141, 1295, 1358, 1630, 1940, 2282, 2590, 2716, 3260, 3395, 3589, 4564, 5180, 5705, 6031, 6790, 7178, 11410, 12062, 13580, 14356, 15811, 17945, 22820, 24124, 25123, 30155, 31622, 35890, 42217, 50246, 60310, 63244, 71780, 79055, 84434, 100492, 110677, 120620, 125615, 158110, 168868, 211085, 221354, 251230, 316220, 422170, 442708, 502460, 553385, 585007, 844340, 1106770, 1170014, 2213540, 2340028, 2925035, 4095049, 5850070, 8190098, 11700140, 16380196, 20475245, 40950490, 81900980]

約数ペア:

[(1, 81900980), (2, 40950490), (4, 20475245), (5, 16380196), (7, 11700140), (10, 8190098), (14, 5850070), (20, 4095049), (28, 2925035), (35, 2340028), (37, 2213540), (70, 1170014), (74, 1106770), (97, 844340), (140, 585007), (148, 553385), (163, 502460), (185, 442708), (194, 422170), (259, 316220), (326, 251230), (370, 221354), (388, 211085), (485, 168868), (518, 158110), (652, 125615), (679, 120620), (740, 110677), (815, 100492), (970, 84434), (1036, 79055), (1141, 71780), (1295, 63244), (1358, 60310), (1630, 50246), (1940, 42217), (2282, 35890), (2590, 31622), (2716, 30155), (3260, 25123), (3395, 24124), (3589, 22820), (4564, 17945), (5180, 15811), (5705, 14356), (6031, 13580), (6790, 12062), (7178, 11410)]