638903120

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{420331}}^1$

素因数の和:420363

約数の個数: 40

約数和(自身を含む): 1563635040

約数和(自身を除く): 924731920

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 420331, 840662, 1681324, 2101655, 3362648, 4203310, 6725296, 7986289, 8406620, 15972578, 16813240, 31945156, 33626480, 39931445, 63890312, 79862890, 127780624, 159725780, 319451560, 638903120]

約数ペア:

[(1, 638903120), (2, 319451560), (4, 159725780), (5, 127780624), (8, 79862890), (10, 63890312), (16, 39931445), (19, 33626480), (20, 31945156), (38, 16813240), (40, 15972578), (76, 8406620), (80, 7986289), (95, 6725296), (152, 4203310), (190, 3362648), (304, 2101655), (380, 1681324), (760, 840662), (1520, 420331)]