499980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{641}}^1$

素因数の和:666

約数の個数: 48

約数和(自身を含む): 1509984

約数和(自身を除く): 1010004

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 641, 780, 1282, 1923, 2564, 3205, 3846, 6410, 7692, 8333, 9615, 12820, 16666, 19230, 24999, 33332, 38460, 41665, 49998, 83330, 99996, 124995, 166660, 249990, 499980]

約数ペア:

[(1, 499980), (2, 249990), (3, 166660), (4, 124995), (5, 99996), (6, 83330), (10, 49998), (12, 41665), (13, 38460), (15, 33332), (20, 24999), (26, 19230), (30, 16666), (39, 12820), (52, 9615), (60, 8333), (65, 7692), (78, 6410), (130, 3846), (156, 3205), (195, 2564), (260, 1923), (390, 1282), (641, 780)]