42721720

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1\times {\mathrm{263}}^1$

素因数の和:436

約数の個数: 64

約数和(自身を含む): 100362240

約数和(自身を除く): 57640520

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 131, 155, 248, 262, 263, 310, 524, 526, 620, 655, 1048, 1052, 1240, 1310, 1315, 2104, 2620, 2630, 4061, 5240, 5260, 8122, 8153, 10520, 16244, 16306, 20305, 32488, 32612, 34453, 40610, 40765, 65224, 68906, 81220, 81530, 137812, 162440, 163060, 172265, 275624, 326120, 344530, 689060, 1068043, 1378120, 2136086, 4272172, 5340215, 8544344, 10680430, 21360860, 42721720]

約数ペア:

[(1, 42721720), (2, 21360860), (4, 10680430), (5, 8544344), (8, 5340215), (10, 4272172), (20, 2136086), (31, 1378120), (40, 1068043), (62, 689060), (124, 344530), (131, 326120), (155, 275624), (248, 172265), (262, 163060), (263, 162440), (310, 137812), (524, 81530), (526, 81220), (620, 68906), (655, 65224), (1048, 40765), (1052, 40610), (1240, 34453), (1310, 32612), (1315, 32488), (2104, 20305), (2620, 16306), (2630, 16244), (4061, 10520), (5240, 8153), (5260, 8122)]