81912325

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{257}}^1$

素因数の和:358

約数の個数: 48

約数和(自身を含む): 119010240

約数和(自身を除く): 37097915

約数列:

[1, 5, 11, 19, 25, 55, 61, 95, 209, 257, 275, 305, 475, 671, 1045, 1159, 1285, 1525, 2827, 3355, 4883, 5225, 5795, 6425, 12749, 14135, 15677, 16775, 24415, 28975, 53713, 63745, 70675, 78385, 122075, 172447, 268565, 297863, 318725, 391925, 862235, 1342825, 1489315, 3276493, 4311175, 7446575, 16382465, 81912325]

約数ペア:

[(1, 81912325), (5, 16382465), (11, 7446575), (19, 4311175), (25, 3276493), (55, 1489315), (61, 1342825), (95, 862235), (209, 391925), (257, 318725), (275, 297863), (305, 268565), (475, 172447), (671, 122075), (1045, 78385), (1159, 70675), (1285, 63745), (1525, 53713), (2827, 28975), (3355, 24415), (4883, 16775), (5225, 15677), (5795, 14135), (6425, 12749)]