81260500

素因数分解:

$2^2\times 5^3\times {\mathrm{331}}^1\times {\mathrm{491}}^1$

素因数の和:841

約数の個数: 48

約数和(自身を含む): 178371648

約数和(自身を除く): 97111148

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 250, 331, 491, 500, 662, 982, 1324, 1655, 1964, 2455, 3310, 4910, 6620, 8275, 9820, 12275, 16550, 24550, 33100, 41375, 49100, 61375, 82750, 122750, 162521, 165500, 245500, 325042, 650084, 812605, 1625210, 3250420, 4063025, 8126050, 16252100, 20315125, 40630250, 81260500]

約数ペア:

[(1, 81260500), (2, 40630250), (4, 20315125), (5, 16252100), (10, 8126050), (20, 4063025), (25, 3250420), (50, 1625210), (100, 812605), (125, 650084), (250, 325042), (331, 245500), (491, 165500), (500, 162521), (662, 122750), (982, 82750), (1324, 61375), (1655, 49100), (1964, 41375), (2455, 33100), (3310, 24550), (4910, 16550), (6620, 12275), (8275, 9820)]