20982560

素因数分解:

$2^5\times 5^1\times {\mathrm{199}}^1\times {\mathrm{659}}^1$

素因数の和:873

約数の個数: 48

約数和(自身を含む): 49896000

約数和(自身を除く): 28913440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 199, 398, 659, 796, 995, 1318, 1592, 1990, 2636, 3184, 3295, 3980, 5272, 6368, 6590, 7960, 10544, 13180, 15920, 21088, 26360, 31840, 52720, 105440, 131141, 262282, 524564, 655705, 1049128, 1311410, 2098256, 2622820, 4196512, 5245640, 10491280, 20982560]

約数ペア:

[(1, 20982560), (2, 10491280), (4, 5245640), (5, 4196512), (8, 2622820), (10, 2098256), (16, 1311410), (20, 1049128), (32, 655705), (40, 524564), (80, 262282), (160, 131141), (199, 105440), (398, 52720), (659, 31840), (796, 26360), (995, 21088), (1318, 15920), (1592, 13180), (1990, 10544), (2636, 7960), (3184, 6590), (3295, 6368), (3980, 5272)]