21159800

素因数分解:

$2^3\times 5^2\times {\mathrm{241}}^1\times {\mathrm{439}}^1$

素因数の和:696

約数の個数: 48

約数和(自身を含む): 49513200

約数和(自身を除く): 28353400

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 241, 439, 482, 878, 964, 1205, 1756, 1928, 2195, 2410, 3512, 4390, 4820, 6025, 8780, 9640, 10975, 12050, 17560, 21950, 24100, 43900, 48200, 87800, 105799, 211598, 423196, 528995, 846392, 1057990, 2115980, 2644975, 4231960, 5289950, 10579900, 21159800]

約数ペア:

[(1, 21159800), (2, 10579900), (4, 5289950), (5, 4231960), (8, 2644975), (10, 2115980), (20, 1057990), (25, 846392), (40, 528995), (50, 423196), (100, 211598), (200, 105799), (241, 87800), (439, 48200), (482, 43900), (878, 24100), (964, 21950), (1205, 17560), (1756, 12050), (1928, 10975), (2195, 9640), (2410, 8780), (3512, 6025), (4390, 4820)]