199961560

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{181}}^1\times {\mathrm{389}}^1$

素因数の和:652

約数の個数: 64

約数和(自身を含む): 459950400

約数和(自身を除く): 259988840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 181, 284, 355, 362, 389, 568, 710, 724, 778, 905, 1420, 1448, 1556, 1810, 1945, 2840, 3112, 3620, 3890, 7240, 7780, 12851, 15560, 25702, 27619, 51404, 55238, 64255, 70409, 102808, 110476, 128510, 138095, 140818, 220952, 257020, 276190, 281636, 352045, 514040, 552380, 563272, 704090, 1104760, 1408180, 2816360, 4999039, 9998078, 19996156, 24995195, 39992312, 49990390, 99980780, 199961560]

約数ペア:

[(1, 199961560), (2, 99980780), (4, 49990390), (5, 39992312), (8, 24995195), (10, 19996156), (20, 9998078), (40, 4999039), (71, 2816360), (142, 1408180), (181, 1104760), (284, 704090), (355, 563272), (362, 552380), (389, 514040), (568, 352045), (710, 281636), (724, 276190), (778, 257020), (905, 220952), (1420, 140818), (1448, 138095), (1556, 128510), (1810, 110476), (1945, 102808), (2840, 70409), (3112, 64255), (3620, 55238), (3890, 51404), (7240, 27619), (7780, 25702), (12851, 15560)]