291339980

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{199}}^1\times {\mathrm{1031}}^1$

素因数の和:1310

約数の個数: 48

約数和(自身を含む): 624153600

約数和(自身を除く): 332813620

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 199, 284, 355, 398, 710, 796, 995, 1031, 1420, 1990, 2062, 3980, 4124, 5155, 10310, 14129, 20620, 28258, 56516, 70645, 73201, 141290, 146402, 205169, 282580, 292804, 366005, 410338, 732010, 820676, 1025845, 1464020, 2051690, 4103380, 14566999, 29133998, 58267996, 72834995, 145669990, 291339980]

約数ペア:

[(1, 291339980), (2, 145669990), (4, 72834995), (5, 58267996), (10, 29133998), (20, 14566999), (71, 4103380), (142, 2051690), (199, 1464020), (284, 1025845), (355, 820676), (398, 732010), (710, 410338), (796, 366005), (995, 292804), (1031, 282580), (1420, 205169), (1990, 146402), (2062, 141290), (3980, 73201), (4124, 70645), (5155, 56516), (10310, 28258), (14129, 20620)]