21695920

素因数分解:

$2^4\times 5^1\times {\mathrm{103}}^1\times {\mathrm{2633}}^1$

素因数の和:2749

約数の個数: 40

約数和(自身を含む): 50952096

約数和(自身を除く): 29256176

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 103, 206, 412, 515, 824, 1030, 1648, 2060, 2633, 4120, 5266, 8240, 10532, 13165, 21064, 26330, 42128, 52660, 105320, 210640, 271199, 542398, 1084796, 1355995, 2169592, 2711990, 4339184, 5423980, 10847960, 21695920]

約数ペア:

[(1, 21695920), (2, 10847960), (4, 5423980), (5, 4339184), (8, 2711990), (10, 2169592), (16, 1355995), (20, 1084796), (40, 542398), (80, 271199), (103, 210640), (206, 105320), (412, 52660), (515, 42128), (824, 26330), (1030, 21064), (1648, 13165), (2060, 10532), (2633, 8240), (4120, 5266)]