209632540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^2\times {\mathrm{839}}^1$

素因数の和:923

約数の個数: 72

約数和(自身を含む): 490462560

約数和(自身を除く): 280830020

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 31, 52, 62, 65, 124, 130, 155, 260, 310, 403, 620, 806, 839, 961, 1612, 1678, 1922, 2015, 3356, 3844, 4030, 4195, 4805, 8060, 8390, 9610, 10907, 12493, 16780, 19220, 21814, 24986, 26009, 43628, 49972, 52018, 54535, 62465, 104036, 109070, 124930, 130045, 218140, 249860, 260090, 338117, 520180, 676234, 806279, 1352468, 1612558, 1690585, 3225116, 3381170, 4031395, 6762340, 8062790, 10481627, 16125580, 20963254, 41926508, 52408135, 104816270, 209632540]

約数ペア:

[(1, 209632540), (2, 104816270), (4, 52408135), (5, 41926508), (10, 20963254), (13, 16125580), (20, 10481627), (26, 8062790), (31, 6762340), (52, 4031395), (62, 3381170), (65, 3225116), (124, 1690585), (130, 1612558), (155, 1352468), (260, 806279), (310, 676234), (403, 520180), (620, 338117), (806, 260090), (839, 249860), (961, 218140), (1612, 130045), (1678, 124930), (1922, 109070), (2015, 104036), (3356, 62465), (3844, 54535), (4030, 52018), (4195, 49972), (4805, 43628), (8060, 26009), (8390, 24986), (9610, 21814), (10907, 19220), (12493, 16780)]