78644000

素因数分解:

$2^5\times 5^3\times {\mathrm{19661}}^1$

素因数の和:19686

約数の個数: 48

約数和(自身を含む): 193238136

約数和(自身を除く): 114594136

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 500, 800, 1000, 2000, 4000, 19661, 39322, 78644, 98305, 157288, 196610, 314576, 393220, 491525, 629152, 786440, 983050, 1572880, 1966100, 2457625, 3145760, 3932200, 4915250, 7864400, 9830500, 15728800, 19661000, 39322000, 78644000]

約数ペア:

[(1, 78644000), (2, 39322000), (4, 19661000), (5, 15728800), (8, 9830500), (10, 7864400), (16, 4915250), (20, 3932200), (25, 3145760), (32, 2457625), (40, 1966100), (50, 1572880), (80, 983050), (100, 786440), (125, 629152), (160, 491525), (200, 393220), (250, 314576), (400, 196610), (500, 157288), (800, 98305), (1000, 78644), (2000, 39322), (4000, 19661)]