81242240

素因数分解:

$2^7\times 5^1\times {\mathrm{61}}^1\times {\mathrm{2081}}^1$

素因数の和:2161

約数の個数: 64

約数和(自身を含む): 197498520

約数和(自身を除く): 116256280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 61, 64, 80, 122, 128, 160, 244, 305, 320, 488, 610, 640, 976, 1220, 1952, 2081, 2440, 3904, 4162, 4880, 7808, 8324, 9760, 10405, 16648, 19520, 20810, 33296, 39040, 41620, 66592, 83240, 126941, 133184, 166480, 253882, 266368, 332960, 507764, 634705, 665920, 1015528, 1269410, 1331840, 2031056, 2538820, 4062112, 5077640, 8124224, 10155280, 16248448, 20310560, 40621120, 81242240]

約数ペア:

[(1, 81242240), (2, 40621120), (4, 20310560), (5, 16248448), (8, 10155280), (10, 8124224), (16, 5077640), (20, 4062112), (32, 2538820), (40, 2031056), (61, 1331840), (64, 1269410), (80, 1015528), (122, 665920), (128, 634705), (160, 507764), (244, 332960), (305, 266368), (320, 253882), (488, 166480), (610, 133184), (640, 126941), (976, 83240), (1220, 66592), (1952, 41620), (2081, 39040), (2440, 33296), (3904, 20810), (4162, 19520), (4880, 16648), (7808, 10405), (8324, 9760)]