665010

素因数分解:

$2^1\times 3^4\times 5^1\times {\mathrm{821}}^1$

素因数の和:840

約数の個数: 40

約数和(自身を含む): 1790316

約数和(自身を除く): 1125306

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 54, 81, 90, 135, 162, 270, 405, 810, 821, 1642, 2463, 4105, 4926, 7389, 8210, 12315, 14778, 22167, 24630, 36945, 44334, 66501, 73890, 110835, 133002, 221670, 332505, 665010]

約数ペア:

[(1, 665010), (2, 332505), (3, 221670), (5, 133002), (6, 110835), (9, 73890), (10, 66501), (15, 44334), (18, 36945), (27, 24630), (30, 22167), (45, 14778), (54, 12315), (81, 8210), (90, 7389), (135, 4926), (162, 4105), (270, 2463), (405, 1642), (810, 821)]