21691990

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{2549}}^1$

素因数の和:2616

約数の個数: 32

約数和(自身を含む): 41860800

約数和(自身を除く): 20168810

約数列:

[1, 2, 5, 10, 23, 37, 46, 74, 115, 185, 230, 370, 851, 1702, 2549, 4255, 5098, 8510, 12745, 25490, 58627, 94313, 117254, 188626, 293135, 471565, 586270, 943130, 2169199, 4338398, 10845995, 21691990]

約数ペア:

[(1, 21691990), (2, 10845995), (5, 4338398), (10, 2169199), (23, 943130), (37, 586270), (46, 471565), (74, 293135), (115, 188626), (185, 117254), (230, 94313), (370, 58627), (851, 25490), (1702, 12745), (2549, 8510), (4255, 5098)]