21016330

素因数分解:

$2^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{131}}^1\times {\mathrm{263}}^1$

素因数の和:462

約数の個数: 32

約数和(自身を含む): 38890368

約数和(自身を除く): 17874038

約数列:

[1, 2, 5, 10, 61, 122, 131, 262, 263, 305, 526, 610, 655, 1310, 1315, 2630, 7991, 15982, 16043, 32086, 34453, 39955, 68906, 79910, 80215, 160430, 172265, 344530, 2101633, 4203266, 10508165, 21016330]

約数ペア:

[(1, 21016330), (2, 10508165), (5, 4203266), (10, 2101633), (61, 344530), (122, 172265), (131, 160430), (262, 80215), (263, 79910), (305, 68906), (526, 39955), (610, 34453), (655, 32086), (1310, 16043), (1315, 15982), (2630, 7991)]