161659420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^2\times {\mathrm{647}}^1$

素因数の和:731

約数の個数: 72

約数和(自身を含む): 378356832

約数和(自身を除く): 216697412

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 31, 52, 62, 65, 124, 130, 155, 260, 310, 403, 620, 647, 806, 961, 1294, 1612, 1922, 2015, 2588, 3235, 3844, 4030, 4805, 6470, 8060, 8411, 9610, 12493, 12940, 16822, 19220, 20057, 24986, 33644, 40114, 42055, 49972, 62465, 80228, 84110, 100285, 124930, 168220, 200570, 249860, 260741, 401140, 521482, 621767, 1042964, 1243534, 1303705, 2487068, 2607410, 3108835, 5214820, 6217670, 8082971, 12435340, 16165942, 32331884, 40414855, 80829710, 161659420]

約数ペア:

[(1, 161659420), (2, 80829710), (4, 40414855), (5, 32331884), (10, 16165942), (13, 12435340), (20, 8082971), (26, 6217670), (31, 5214820), (52, 3108835), (62, 2607410), (65, 2487068), (124, 1303705), (130, 1243534), (155, 1042964), (260, 621767), (310, 521482), (403, 401140), (620, 260741), (647, 249860), (806, 200570), (961, 168220), (1294, 124930), (1612, 100285), (1922, 84110), (2015, 80228), (2588, 62465), (3235, 49972), (3844, 42055), (4030, 40114), (4805, 33644), (6470, 24986), (8060, 20057), (8411, 19220), (9610, 16822), (12493, 12940)]