20738380

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^2\times {\mathrm{83}}^1$

素因数の和:167

約数の個数: 72

約数和(自身を含む): 49046256

約数和(自身を除く): 28307876

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 31, 52, 62, 65, 83, 124, 130, 155, 166, 260, 310, 332, 403, 415, 620, 806, 830, 961, 1079, 1612, 1660, 1922, 2015, 2158, 2573, 3844, 4030, 4316, 4805, 5146, 5395, 8060, 9610, 10292, 10790, 12493, 12865, 19220, 21580, 24986, 25730, 33449, 49972, 51460, 62465, 66898, 79763, 124930, 133796, 159526, 167245, 249860, 319052, 334490, 398815, 668980, 797630, 1036919, 1595260, 2073838, 4147676, 5184595, 10369190, 20738380]

約数ペア:

[(1, 20738380), (2, 10369190), (4, 5184595), (5, 4147676), (10, 2073838), (13, 1595260), (20, 1036919), (26, 797630), (31, 668980), (52, 398815), (62, 334490), (65, 319052), (83, 249860), (124, 167245), (130, 159526), (155, 133796), (166, 124930), (260, 79763), (310, 66898), (332, 62465), (403, 51460), (415, 49972), (620, 33449), (806, 25730), (830, 24986), (961, 21580), (1079, 19220), (1612, 12865), (1660, 12493), (1922, 10790), (2015, 10292), (2158, 9610), (2573, 8060), (3844, 5395), (4030, 5146), (4316, 4805)]