19965840

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{3617}}^1$

素因数の和:3656

約数の個数: 80

約数和(自身を含む): 64603008

約数和(自身を除く): 44637168

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 23, 24, 30, 40, 46, 48, 60, 69, 80, 92, 115, 120, 138, 184, 230, 240, 276, 345, 368, 460, 552, 690, 920, 1104, 1380, 1840, 2760, 3617, 5520, 7234, 10851, 14468, 18085, 21702, 28936, 36170, 43404, 54255, 57872, 72340, 83191, 86808, 108510, 144680, 166382, 173616, 217020, 249573, 289360, 332764, 415955, 434040, 499146, 665528, 831910, 868080, 998292, 1247865, 1331056, 1663820, 1996584, 2495730, 3327640, 3993168, 4991460, 6655280, 9982920, 19965840]

約数ペア:

[(1, 19965840), (2, 9982920), (3, 6655280), (4, 4991460), (5, 3993168), (6, 3327640), (8, 2495730), (10, 1996584), (12, 1663820), (15, 1331056), (16, 1247865), (20, 998292), (23, 868080), (24, 831910), (30, 665528), (40, 499146), (46, 434040), (48, 415955), (60, 332764), (69, 289360), (80, 249573), (92, 217020), (115, 173616), (120, 166382), (138, 144680), (184, 108510), (230, 86808), (240, 83191), (276, 72340), (345, 57872), (368, 54255), (460, 43404), (552, 36170), (690, 28936), (920, 21702), (1104, 18085), (1380, 14468), (1840, 10851), (2760, 7234), (3617, 5520)]