20249975

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1$

素因数の和:140

約数の個数: 48

約数和(自身を含む): 28926720

約数和(自身を除く): 8676745

約数列:

[1, 5, 17, 25, 29, 31, 53, 85, 145, 155, 265, 425, 493, 527, 725, 775, 899, 901, 1325, 1537, 1643, 2465, 2635, 4495, 4505, 7685, 8215, 12325, 13175, 15283, 22475, 22525, 26129, 27931, 38425, 41075, 47647, 76415, 130645, 139655, 238235, 382075, 653225, 698275, 809999, 1191175, 4049995, 20249975]

約数ペア:

[(1, 20249975), (5, 4049995), (17, 1191175), (25, 809999), (29, 698275), (31, 653225), (53, 382075), (85, 238235), (145, 139655), (155, 130645), (265, 76415), (425, 47647), (493, 41075), (527, 38425), (725, 27931), (775, 26129), (899, 22525), (901, 22475), (1325, 15283), (1537, 13175), (1643, 12325), (2465, 8215), (2635, 7685), (4495, 4505)]