21728675

素因数分解:

$5^2\times {\mathrm{23}}^2\times {\mathrm{31}}^1\times {\mathrm{53}}^1$

素因数の和:140

約数の個数: 36

約数和(自身を含む): 29623104

約数和(自身を除く): 7894429

約数列:

[1, 5, 23, 25, 31, 53, 115, 155, 265, 529, 575, 713, 775, 1219, 1325, 1643, 2645, 3565, 6095, 8215, 13225, 16399, 17825, 28037, 30475, 37789, 41075, 81995, 140185, 188945, 409975, 700925, 869147, 944725, 4345735, 21728675]

約数ペア:

[(1, 21728675), (5, 4345735), (23, 944725), (25, 869147), (31, 700925), (53, 409975), (115, 188945), (155, 140185), (265, 81995), (529, 41075), (575, 37789), (713, 30475), (775, 28037), (1219, 17825), (1325, 16399), (1643, 13225), (2645, 8215), (3565, 6095)]