19645280

素因数分解:

$2^5\times 5^1\times {\mathrm{199}}^1\times {\mathrm{617}}^1$

素因数の和:831

約数の個数: 48

約数和(自身を含む): 46720800

約数和(自身を除く): 27075520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 199, 398, 617, 796, 995, 1234, 1592, 1990, 2468, 3085, 3184, 3980, 4936, 6170, 6368, 7960, 9872, 12340, 15920, 19744, 24680, 31840, 49360, 98720, 122783, 245566, 491132, 613915, 982264, 1227830, 1964528, 2455660, 3929056, 4911320, 9822640, 19645280]

約数ペア:

[(1, 19645280), (2, 9822640), (4, 4911320), (5, 3929056), (8, 2455660), (10, 1964528), (16, 1227830), (20, 982264), (32, 613915), (40, 491132), (80, 245566), (160, 122783), (199, 98720), (398, 49360), (617, 31840), (796, 24680), (995, 19744), (1234, 15920), (1592, 12340), (1990, 9872), (2468, 7960), (3085, 6368), (3184, 6170), (3980, 4936)]