20939775

素因数分解:

$3^1\times 5^2\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{199}}^1$

素因数の和:296

約数の個数: 48

約数和(自身を含む): 36902400

約数和(自身を除く): 15962625

約数列:

[1, 3, 5, 15, 23, 25, 61, 69, 75, 115, 183, 199, 305, 345, 575, 597, 915, 995, 1403, 1525, 1725, 2985, 4209, 4575, 4577, 4975, 7015, 12139, 13731, 14925, 21045, 22885, 35075, 36417, 60695, 68655, 105225, 114425, 182085, 279197, 303475, 343275, 837591, 910425, 1395985, 4187955, 6979925, 20939775]

約数ペア:

[(1, 20939775), (3, 6979925), (5, 4187955), (15, 1395985), (23, 910425), (25, 837591), (61, 343275), (69, 303475), (75, 279197), (115, 182085), (183, 114425), (199, 105225), (305, 68655), (345, 60695), (575, 36417), (597, 35075), (915, 22885), (995, 21045), (1403, 14925), (1525, 13731), (1725, 12139), (2985, 7015), (4209, 4975), (4575, 4577)]