123456780

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{14593}}^1$

素因数の和:14655

約数の個数: 72

約数和(自身を含む): 382479552

約数和(自身を除く): 259022772

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 47, 60, 90, 94, 141, 180, 188, 235, 282, 423, 470, 564, 705, 846, 940, 1410, 1692, 2115, 2820, 4230, 8460, 14593, 29186, 43779, 58372, 72965, 87558, 131337, 145930, 175116, 218895, 262674, 291860, 437790, 525348, 656685, 685871, 875580, 1313370, 1371742, 2057613, 2626740, 2743484, 3429355, 4115226, 6172839, 6858710, 8230452, 10288065, 12345678, 13717420, 20576130, 24691356, 30864195, 41152260, 61728390, 123456780]

約数ペア:

[(1, 123456780), (2, 61728390), (3, 41152260), (4, 30864195), (5, 24691356), (6, 20576130), (9, 13717420), (10, 12345678), (12, 10288065), (15, 8230452), (18, 6858710), (20, 6172839), (30, 4115226), (36, 3429355), (45, 2743484), (47, 2626740), (60, 2057613), (90, 1371742), (94, 1313370), (141, 875580), (180, 685871), (188, 656685), (235, 525348), (282, 437790), (423, 291860), (470, 262674), (564, 218895), (705, 175116), (846, 145930), (940, 131337), (1410, 87558), (1692, 72965), (2115, 58372), (2820, 43779), (4230, 29186), (8460, 14593)]