217877920

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^2\times {\mathrm{109}}^1$

素因数の和:199

約数の個数: 144

約数和(自身を含む): 578045160

約数和(自身を除く): 360167240

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 32, 40, 52, 62, 65, 80, 104, 109, 124, 130, 155, 160, 208, 218, 248, 260, 310, 403, 416, 436, 496, 520, 545, 620, 806, 872, 961, 992, 1040, 1090, 1240, 1417, 1612, 1744, 1922, 2015, 2080, 2180, 2480, 2834, 3224, 3379, 3488, 3844, 4030, 4360, 4805, 4960, 5668, 6448, 6758, 7085, 7688, 8060, 8720, 9610, 11336, 12493, 12896, 13516, 14170, 15376, 16120, 16895, 17440, 19220, 22672, 24986, 27032, 28340, 30752, 32240, 33790, 38440, 43927, 45344, 49972, 54064, 56680, 62465, 64480, 67580, 76880, 87854, 99944, 104749, 108128, 113360, 124930, 135160, 153760, 175708, 199888, 209498, 219635, 226720, 249860, 270320, 351416, 399776, 418996, 439270, 499720, 523745, 540640, 702832, 837992, 878540, 999440, 1047490, 1361737, 1405664, 1675984, 1757080, 1998880, 2094980, 2723474, 3351968, 3514160, 4189960, 5446948, 6808685, 7028320, 8379920, 10893896, 13617370, 16759840, 21787792, 27234740, 43575584, 54469480, 108938960, 217877920]

約数ペア:

[(1, 217877920), (2, 108938960), (4, 54469480), (5, 43575584), (8, 27234740), (10, 21787792), (13, 16759840), (16, 13617370), (20, 10893896), (26, 8379920), (31, 7028320), (32, 6808685), (40, 5446948), (52, 4189960), (62, 3514160), (65, 3351968), (80, 2723474), (104, 2094980), (109, 1998880), (124, 1757080), (130, 1675984), (155, 1405664), (160, 1361737), (208, 1047490), (218, 999440), (248, 878540), (260, 837992), (310, 702832), (403, 540640), (416, 523745), (436, 499720), (496, 439270), (520, 418996), (545, 399776), (620, 351416), (806, 270320), (872, 249860), (961, 226720), (992, 219635), (1040, 209498), (1090, 199888), (1240, 175708), (1417, 153760), (1612, 135160), (1744, 124930), (1922, 113360), (2015, 108128), (2080, 104749), (2180, 99944), (2480, 87854), (2834, 76880), (3224, 67580), (3379, 64480), (3488, 62465), (3844, 56680), (4030, 54064), (4360, 49972), (4805, 45344), (4960, 43927), (5668, 38440), (6448, 33790), (6758, 32240), (7085, 30752), (7688, 28340), (8060, 27032), (8720, 24986), (9610, 22672), (11336, 19220), (12493, 17440), (12896, 16895), (13516, 16120), (14170, 15376)]