18239780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^2\times {\mathrm{73}}^1$

素因数の和:157

約数の個数: 72

約数和(自身を含む): 43207416

約数和(自身を除く): 24967636

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 31, 52, 62, 65, 73, 124, 130, 146, 155, 260, 292, 310, 365, 403, 620, 730, 806, 949, 961, 1460, 1612, 1898, 1922, 2015, 2263, 3796, 3844, 4030, 4526, 4745, 4805, 8060, 9052, 9490, 9610, 11315, 12493, 18980, 19220, 22630, 24986, 29419, 45260, 49972, 58838, 62465, 70153, 117676, 124930, 140306, 147095, 249860, 280612, 294190, 350765, 588380, 701530, 911989, 1403060, 1823978, 3647956, 4559945, 9119890, 18239780]

約数ペア:

[(1, 18239780), (2, 9119890), (4, 4559945), (5, 3647956), (10, 1823978), (13, 1403060), (20, 911989), (26, 701530), (31, 588380), (52, 350765), (62, 294190), (65, 280612), (73, 249860), (124, 147095), (130, 140306), (146, 124930), (155, 117676), (260, 70153), (292, 62465), (310, 58838), (365, 49972), (403, 45260), (620, 29419), (730, 24986), (806, 22630), (949, 19220), (961, 18980), (1460, 12493), (1612, 11315), (1898, 9610), (1922, 9490), (2015, 9052), (2263, 8060), (3796, 4805), (3844, 4745), (4030, 4526)]