213989860

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{218357}}^1$

素因数の和:218380

約数の個数: 36

約数和(自身を含む): 522749052

約数和(自身を除く): 308759192

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 218357, 436714, 873428, 1091785, 1528499, 2183570, 3056998, 4367140, 6113996, 7642495, 10699493, 15284990, 21398986, 30569980, 42797972, 53497465, 106994930, 213989860]

約数ペア:

[(1, 213989860), (2, 106994930), (4, 53497465), (5, 42797972), (7, 30569980), (10, 21398986), (14, 15284990), (20, 10699493), (28, 7642495), (35, 6113996), (49, 4367140), (70, 3056998), (98, 2183570), (140, 1528499), (196, 1091785), (245, 873428), (490, 436714), (980, 218357)]