31178225

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{97}}^1$

素因数の和:186

約数の個数: 48

約数和(自身を含む): 44913792

約数和(自身を除く): 13735567

約数列:

[1, 5, 13, 23, 25, 43, 65, 97, 115, 215, 299, 325, 485, 559, 575, 989, 1075, 1261, 1495, 2231, 2425, 2795, 4171, 4945, 6305, 7475, 11155, 12857, 13975, 20855, 24725, 29003, 31525, 54223, 55775, 64285, 95933, 104275, 145015, 271115, 321425, 479665, 725075, 1247129, 1355575, 2398325, 6235645, 31178225]

約数ペア:

[(1, 31178225), (5, 6235645), (13, 2398325), (23, 1355575), (25, 1247129), (43, 725075), (65, 479665), (97, 321425), (115, 271115), (215, 145015), (299, 104275), (325, 95933), (485, 64285), (559, 55775), (575, 54223), (989, 31525), (1075, 29003), (1261, 24725), (1495, 20855), (2231, 13975), (2425, 12857), (2795, 11155), (4171, 7475), (4945, 6305)]