19893320

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{263}}^1$

素因数の和:366

約数の個数: 64

約数和(自身を含む): 47139840

約数和(自身を除く): 27246520

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 61, 62, 122, 124, 155, 244, 248, 263, 305, 310, 488, 526, 610, 620, 1052, 1220, 1240, 1315, 1891, 2104, 2440, 2630, 3782, 5260, 7564, 8153, 9455, 10520, 15128, 16043, 16306, 18910, 32086, 32612, 37820, 40765, 64172, 65224, 75640, 80215, 81530, 128344, 160430, 163060, 320860, 326120, 497333, 641720, 994666, 1989332, 2486665, 3978664, 4973330, 9946660, 19893320]

約数ペア:

[(1, 19893320), (2, 9946660), (4, 4973330), (5, 3978664), (8, 2486665), (10, 1989332), (20, 994666), (31, 641720), (40, 497333), (61, 326120), (62, 320860), (122, 163060), (124, 160430), (155, 128344), (244, 81530), (248, 80215), (263, 75640), (305, 65224), (310, 64172), (488, 40765), (526, 37820), (610, 32612), (620, 32086), (1052, 18910), (1220, 16306), (1240, 16043), (1315, 15128), (1891, 10520), (2104, 9455), (2440, 8153), (2630, 7564), (3782, 5260)]